/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/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:44:36,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:44:36,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:44:36,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:44:36,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 13:44:36,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 13:44:36,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 13:44:36,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 13:44:36,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 13:44:36,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 13:44:36,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 13:44:36,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 13:44:36,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 13:44:36,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 13:44:36,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 13:44:36,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 13:44:36,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 13:44:36,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 13:44:36,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 13:44:36,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 13:44:36,250 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 13:44:36,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:44:36,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:44:36,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:44:36,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:44:36,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:44:36,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:44:36,280 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:44:36,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:44:36,280 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:44:36,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:44:36,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:44:36,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:44:36,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:44:36,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:44:36,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:44:36,281 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:44:36,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:44:36,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:44:36,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:44:36,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:44:36,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:44:36,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:44:36,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:44:36,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:44:36,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:44:36,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:44:36,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:44:36,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:44:36,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:44:36,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:44:36,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:44:36,283 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:44:36,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:44:36,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:44:36,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:44:36,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:44:36,545 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:44:36,547 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:44:36,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-06-05 13:44:36,547 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-06-05 13:44:36,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:44:36,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:44:36,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:44:36,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:44:36,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:44:36,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/1) ... [2021-06-05 13:44:36,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/1) ... [2021-06-05 13:44:36,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:44:36,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:44:36,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:44:36,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:44:36,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/1) ... [2021-06-05 13:44:36,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/1) ... [2021-06-05 13:44:36,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/1) ... [2021-06-05 13:44:36,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/1) ... [2021-06-05 13:44:36,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/1) ... [2021-06-05 13:44:36,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/1) ... [2021-06-05 13:44:36,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/1) ... [2021-06-05 13:44:36,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:44:36,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:44:36,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:44:36,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:44:36,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (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 13:44:36,667 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:44:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:44:36,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:44:36,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:44:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:44:36,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:44:36,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:44:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:44:36,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:44:36,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 13:44:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 13:44:36,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 13:44:36,669 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 13:44:36,789 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:44:36,789 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:44:36,790 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:44:36 BoogieIcfgContainer [2021-06-05 13:44:36,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:44:36,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:44:36,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:44:36,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:44:36,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:44:36" (1/2) ... [2021-06-05 13:44:36,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f68b129 and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:44:36, skipping insertion in model container [2021-06-05 13:44:36,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:44:36" (2/2) ... [2021-06-05 13:44:36,795 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-06-05 13:44:36,799 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:44:36,799 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:44:36,799 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:44:36,799 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:44:36,823 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 13:44:36,838 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 13:44:36,857 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:44:36,857 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:44:36,857 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:44:36,857 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:44:36,857 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:44:36,857 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:44:36,857 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:44:36,857 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:44:36,880 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-06-05 13:44:36,894 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:44:36,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:36,903 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:36,903 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:36,907 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-06-05 13:44:36,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:36,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126130303] [2021-06-05 13:44:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:37,150 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 13:44:37,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:37,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126130303] [2021-06-05 13:44:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126130303] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:44:37,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:44:37,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:44:37,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356581912] [2021-06-05 13:44:37,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:44:37,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:44:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:44:37,164 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:37,185 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-06-05 13:44:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:44:37,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:44:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:37,194 INFO L225 Difference]: With dead ends: 214 [2021-06-05 13:44:37,194 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 13:44:37,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:44:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 13:44:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 13:44:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-06-05 13:44:37,227 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-06-05 13:44:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:37,228 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-06-05 13:44:37,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-06-05 13:44:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:37,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:37,229 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:37,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:44:37,229 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:37,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-06-05 13:44:37,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:37,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137435295] [2021-06-05 13:44:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:37,294 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 13:44:37,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:37,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137435295] [2021-06-05 13:44:37,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137435295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665088561] [2021-06-05 13:44:37,296 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 13:44:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:37,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:44:37,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:37,458 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 13:44:37,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665088561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:37,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:37,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-06-05 13:44:37,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568825715] [2021-06-05 13:44:37,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:44:37,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:37,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:44:37,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:44:37,461 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:37,639 INFO L93 Difference]: Finished difference Result 468 states and 1303 transitions. [2021-06-05 13:44:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:44:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:37,642 INFO L225 Difference]: With dead ends: 468 [2021-06-05 13:44:37,642 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 13:44:37,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 13:44:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 173. [2021-06-05 13:44:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2021-06-05 13:44:37,656 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2021-06-05 13:44:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:37,656 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2021-06-05 13:44:37,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2021-06-05 13:44:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:37,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:37,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:37,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 13:44:37,873 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:37,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-06-05 13:44:37,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:37,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251294436] [2021-06-05 13:44:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:37,898 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 13:44:37,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:37,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251294436] [2021-06-05 13:44:37,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251294436] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:44:37,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:44:37,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:44:37,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635416608] [2021-06-05 13:44:37,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:44:37,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:37,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:44:37,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:44:37,900 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:37,937 INFO L93 Difference]: Finished difference Result 283 states and 814 transitions. [2021-06-05 13:44:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:44:37,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:37,943 INFO L225 Difference]: With dead ends: 283 [2021-06-05 13:44:37,943 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 13:44:37,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:44:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 13:44:37,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2021-06-05 13:44:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.994413407821229) internal successors, (536), 179 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2021-06-05 13:44:37,961 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 17 [2021-06-05 13:44:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:37,961 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2021-06-05 13:44:37,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2021-06-05 13:44:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:37,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:37,963 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:37,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:44:37,963 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash 899406176, now seen corresponding path program 2 times [2021-06-05 13:44:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:37,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72924586] [2021-06-05 13:44:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:37,996 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 13:44:37,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:37,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72924586] [2021-06-05 13:44:37,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72924586] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:44:37,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:44:37,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:44:37,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39503436] [2021-06-05 13:44:37,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:44:37,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:37,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:44:37,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:44:37,998 INFO L87 Difference]: Start difference. First operand 180 states and 536 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:38,031 INFO L93 Difference]: Finished difference Result 339 states and 942 transitions. [2021-06-05 13:44:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:44:38,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:38,033 INFO L225 Difference]: With dead ends: 339 [2021-06-05 13:44:38,033 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 13:44:38,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:44:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 13:44:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 156. [2021-06-05 13:44:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2021-06-05 13:44:38,042 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2021-06-05 13:44:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:38,042 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2021-06-05 13:44:38,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2021-06-05 13:44:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:38,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:38,043 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:38,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:44:38,044 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:38,044 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-06-05 13:44:38,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:38,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9470961] [2021-06-05 13:44:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:38,076 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 13:44:38,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:38,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9470961] [2021-06-05 13:44:38,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9470961] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:44:38,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:44:38,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:44:38,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007384359] [2021-06-05 13:44:38,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:44:38,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:38,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:44:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:44:38,083 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:38,186 INFO L93 Difference]: Finished difference Result 253 states and 691 transitions. [2021-06-05 13:44:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:44:38,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:38,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:38,188 INFO L225 Difference]: With dead ends: 253 [2021-06-05 13:44:38,188 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 13:44:38,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 13:44:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 175. [2021-06-05 13:44:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8620689655172415) internal successors, (498), 174 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 498 transitions. [2021-06-05 13:44:38,194 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 498 transitions. Word has length 17 [2021-06-05 13:44:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:38,194 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 498 transitions. [2021-06-05 13:44:38,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 498 transitions. [2021-06-05 13:44:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:38,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:38,196 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:38,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:44:38,196 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:38,196 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 2 times [2021-06-05 13:44:38,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:38,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875776095] [2021-06-05 13:44:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:38,225 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 13:44:38,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:38,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875776095] [2021-06-05 13:44:38,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875776095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506930433] [2021-06-05 13:44:38,225 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 13:44:38,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:38,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:38,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:38,369 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 13:44:38,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506930433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:38,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:38,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 13:44:38,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269808646] [2021-06-05 13:44:38,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:44:38,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:38,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:44:38,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:44:38,371 INFO L87 Difference]: Start difference. First operand 175 states and 498 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:38,669 INFO L93 Difference]: Finished difference Result 429 states and 1177 transitions. [2021-06-05 13:44:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:44:38,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:38,673 INFO L225 Difference]: With dead ends: 429 [2021-06-05 13:44:38,673 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 13:44:38,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:38,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 13:44:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 185. [2021-06-05 13:44:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9184782608695654) internal successors, (537), 184 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 537 transitions. [2021-06-05 13:44:38,685 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 537 transitions. Word has length 17 [2021-06-05 13:44:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:38,686 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 537 transitions. [2021-06-05 13:44:38,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 537 transitions. [2021-06-05 13:44:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:38,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:38,686 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:38,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:38,905 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash -897270306, now seen corresponding path program 3 times [2021-06-05 13:44:38,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:38,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481356713] [2021-06-05 13:44:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:38,934 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 13:44:38,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:38,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481356713] [2021-06-05 13:44:38,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481356713] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:44:38,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:44:38,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:44:38,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770225596] [2021-06-05 13:44:38,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:44:38,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:38,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:44:38,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:44:38,936 INFO L87 Difference]: Start difference. First operand 185 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:38,986 INFO L93 Difference]: Finished difference Result 300 states and 817 transitions. [2021-06-05 13:44:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:44:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:38,987 INFO L225 Difference]: With dead ends: 300 [2021-06-05 13:44:38,987 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 13:44:38,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:44:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 13:44:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 191. [2021-06-05 13:44:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.873684210526316) internal successors, (546), 190 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 546 transitions. [2021-06-05 13:44:38,992 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 546 transitions. Word has length 17 [2021-06-05 13:44:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:38,992 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 546 transitions. [2021-06-05 13:44:38,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 546 transitions. [2021-06-05 13:44:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:38,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:38,993 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:38,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 13:44:38,993 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:38,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1386380322, now seen corresponding path program 3 times [2021-06-05 13:44:38,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:38,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772587994] [2021-06-05 13:44:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,016 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 13:44:39,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:39,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772587994] [2021-06-05 13:44:39,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772587994] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:44:39,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:44:39,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:44:39,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177704993] [2021-06-05 13:44:39,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:44:39,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:39,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:44:39,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:44:39,017 INFO L87 Difference]: Start difference. First operand 191 states and 546 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:39,100 INFO L93 Difference]: Finished difference Result 305 states and 826 transitions. [2021-06-05 13:44:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:39,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:39,102 INFO L225 Difference]: With dead ends: 305 [2021-06-05 13:44:39,102 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 13:44:39,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 13:44:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 197. [2021-06-05 13:44:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-06-05 13:44:39,107 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-06-05 13:44:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:39,107 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-06-05 13:44:39,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,107 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-06-05 13:44:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:39,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:39,108 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:39,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:44:39,108 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1009070818, now seen corresponding path program 4 times [2021-06-05 13:44:39,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:39,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081193902] [2021-06-05 13:44:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,151 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 13:44:39,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:39,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081193902] [2021-06-05 13:44:39,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081193902] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:44:39,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:44:39,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:44:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779960677] [2021-06-05 13:44:39,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:44:39,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:44:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:44:39,153 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:39,231 INFO L93 Difference]: Finished difference Result 285 states and 789 transitions. [2021-06-05 13:44:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:44:39,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:39,233 INFO L225 Difference]: With dead ends: 285 [2021-06-05 13:44:39,233 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 13:44:39,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 13:44:39,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-06-05 13:44:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.896039603960396) internal successors, (585), 202 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 585 transitions. [2021-06-05 13:44:39,237 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 585 transitions. Word has length 17 [2021-06-05 13:44:39,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:39,237 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 585 transitions. [2021-06-05 13:44:39,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 585 transitions. [2021-06-05 13:44:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:39,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:39,238 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:39,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 13:44:39,238 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash -683037018, now seen corresponding path program 2 times [2021-06-05 13:44:39,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:39,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883094203] [2021-06-05 13:44:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,262 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 13:44:39,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:39,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883094203] [2021-06-05 13:44:39,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883094203] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:44:39,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:44:39,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:44:39,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568734828] [2021-06-05 13:44:39,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:44:39,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:39,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:44:39,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:44:39,263 INFO L87 Difference]: Start difference. First operand 203 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:39,310 INFO L93 Difference]: Finished difference Result 251 states and 716 transitions. [2021-06-05 13:44:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:44:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:39,312 INFO L225 Difference]: With dead ends: 251 [2021-06-05 13:44:39,312 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 13:44:39,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:44:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 13:44:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 193. [2021-06-05 13:44:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.8958333333333335) internal successors, (556), 192 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 556 transitions. [2021-06-05 13:44:39,317 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 556 transitions. Word has length 17 [2021-06-05 13:44:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:39,318 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 556 transitions. [2021-06-05 13:44:39,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 556 transitions. [2021-06-05 13:44:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:39,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:39,319 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:39,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 13:44:39,319 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:39,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 5 times [2021-06-05 13:44:39,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:39,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010220767] [2021-06-05 13:44:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,371 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 13:44:39,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:39,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010220767] [2021-06-05 13:44:39,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010220767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373385360] [2021-06-05 13:44:39,371 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 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 13:44:39,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:39,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:39,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:39,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:39,491 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 13:44:39,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373385360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:39,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:44:39,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956728192] [2021-06-05 13:44:39,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:39,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:39,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:39,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:39,492 INFO L87 Difference]: Start difference. First operand 193 states and 556 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:39,648 INFO L93 Difference]: Finished difference Result 357 states and 1012 transitions. [2021-06-05 13:44:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:44:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:39,649 INFO L225 Difference]: With dead ends: 357 [2021-06-05 13:44:39,649 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 13:44:39,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:44:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 13:44:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-06-05 13:44:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-06-05 13:44:39,655 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-06-05 13:44:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:39,655 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-06-05 13:44:39,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-06-05 13:44:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:44:39,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:39,656 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:39,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 13:44:39,869 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash -266101350, now seen corresponding path program 6 times [2021-06-05 13:44:39,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:39,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558993579] [2021-06-05 13:44:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:39,926 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 13:44:39,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:39,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558993579] [2021-06-05 13:44:39,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558993579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:39,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491459135] [2021-06-05 13:44:39,927 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 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 13:44:39,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:44:39,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:40,042 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 13:44:40,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491459135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:40,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:44:40,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055524872] [2021-06-05 13:44:40,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:40,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:40,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:40,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:40,044 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:40,229 INFO L93 Difference]: Finished difference Result 311 states and 903 transitions. [2021-06-05 13:44:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:44:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:44:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:40,231 INFO L225 Difference]: With dead ends: 311 [2021-06-05 13:44:40,231 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 13:44:40,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 13:44:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 168. [2021-06-05 13:44:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2021-06-05 13:44:40,237 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2021-06-05 13:44:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:40,237 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2021-06-05 13:44:40,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2021-06-05 13:44:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:44:40,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:40,237 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:40,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:40,453 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1253760644, now seen corresponding path program 1 times [2021-06-05 13:44:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:40,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994609575] [2021-06-05 13:44:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:40,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:40,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994609575] [2021-06-05 13:44:40,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994609575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089706936] [2021-06-05 13:44:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:44:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:40,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:44:40,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:40,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089706936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:40,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:44:40,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106693200] [2021-06-05 13:44:40,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:40,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:40,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:40,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:40,623 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:40,714 INFO L93 Difference]: Finished difference Result 554 states and 1610 transitions. [2021-06-05 13:44:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:44:40,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:44:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:40,716 INFO L225 Difference]: With dead ends: 554 [2021-06-05 13:44:40,716 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 13:44:40,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 13:44:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2021-06-05 13:44:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.06) internal successors, (918), 300 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 918 transitions. [2021-06-05 13:44:40,725 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 918 transitions. Word has length 19 [2021-06-05 13:44:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:40,725 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 918 transitions. [2021-06-05 13:44:40,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 918 transitions. [2021-06-05 13:44:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:44:40,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:40,727 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:40,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 13:44:40,943 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash -346541578, now seen corresponding path program 2 times [2021-06-05 13:44:40,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:40,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375436339] [2021-06-05 13:44:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:40,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:40,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375436339] [2021-06-05 13:44:40,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375436339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:40,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116693406] [2021-06-05 13:44:40,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:44:41,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:41,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:41,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:44:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:41,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116693406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:41,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:44:41,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175860953] [2021-06-05 13:44:41,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:41,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:41,067 INFO L87 Difference]: Start difference. First operand 301 states and 918 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:41,122 INFO L93 Difference]: Finished difference Result 707 states and 2108 transitions. [2021-06-05 13:44:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:44:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:44:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:41,125 INFO L225 Difference]: With dead ends: 707 [2021-06-05 13:44:41,125 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 13:44:41,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:44:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 13:44:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 412. [2021-06-05 13:44:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.1800486618004866) internal successors, (1307), 411 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1307 transitions. [2021-06-05 13:44:41,134 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1307 transitions. Word has length 19 [2021-06-05 13:44:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:41,134 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1307 transitions. [2021-06-05 13:44:41,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1307 transitions. [2021-06-05 13:44:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:41,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:41,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:41,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:41,349 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash -233680794, now seen corresponding path program 3 times [2021-06-05 13:44:41,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:41,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285135830] [2021-06-05 13:44:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:41,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:41,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285135830] [2021-06-05 13:44:41,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285135830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840564438] [2021-06-05 13:44:41,386 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:44:41,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:44:41,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:41,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:41,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:41,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840564438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:41,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:44:41,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156454674] [2021-06-05 13:44:41,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:41,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:41,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:41,483 INFO L87 Difference]: Start difference. First operand 412 states and 1307 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:41,726 INFO L93 Difference]: Finished difference Result 1001 states and 3011 transitions. [2021-06-05 13:44:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:44:41,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:41,730 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 13:44:41,730 INFO L226 Difference]: Without dead ends: 1001 [2021-06-05 13:44:41,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:44:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-06-05 13:44:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 544. [2021-06-05 13:44:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.296500920810313) internal successors, (1790), 543 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1790 transitions. [2021-06-05 13:44:41,743 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1790 transitions. Word has length 21 [2021-06-05 13:44:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:41,743 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1790 transitions. [2021-06-05 13:44:41,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1790 transitions. [2021-06-05 13:44:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:41,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:41,744 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:41,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 13:44:41,957 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-06-05 13:44:41,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:41,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401435494] [2021-06-05 13:44:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:41,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:41,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401435494] [2021-06-05 13:44:41,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401435494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:41,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226018435] [2021-06-05 13:44:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:44:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:44:42,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:42,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226018435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:42,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:44:42,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243294541] [2021-06-05 13:44:42,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:42,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:42,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:42,119 INFO L87 Difference]: Start difference. First operand 544 states and 1790 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:42,501 INFO L93 Difference]: Finished difference Result 1180 states and 3710 transitions. [2021-06-05 13:44:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:44:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:42,505 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 13:44:42,505 INFO L226 Difference]: Without dead ends: 1180 [2021-06-05 13:44:42,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:44:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-06-05 13:44:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 666. [2021-06-05 13:44:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.299248120300752) internal successors, (2194), 665 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2194 transitions. [2021-06-05 13:44:42,519 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2194 transitions. Word has length 21 [2021-06-05 13:44:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:42,520 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2194 transitions. [2021-06-05 13:44:42,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2194 transitions. [2021-06-05 13:44:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:42,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:42,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:42,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 13:44:42,737 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:42,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1584655390, now seen corresponding path program 4 times [2021-06-05 13:44:42,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:42,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890910012] [2021-06-05 13:44:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:42,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:42,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890910012] [2021-06-05 13:44:42,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890910012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667956020] [2021-06-05 13:44:42,766 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:44:42,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:42,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:42,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:42,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:42,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667956020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:42,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:42,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:42,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583556575] [2021-06-05 13:44:42,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:42,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:42,885 INFO L87 Difference]: Start difference. First operand 666 states and 2194 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:43,235 INFO L93 Difference]: Finished difference Result 1002 states and 3098 transitions. [2021-06-05 13:44:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:43,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:43,252 INFO L225 Difference]: With dead ends: 1002 [2021-06-05 13:44:43,252 INFO L226 Difference]: Without dead ends: 977 [2021-06-05 13:44:43,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:44:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-06-05 13:44:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 713. [2021-06-05 13:44:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.289325842696629) internal successors, (2342), 712 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:43,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2342 transitions. [2021-06-05 13:44:43,266 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2342 transitions. Word has length 21 [2021-06-05 13:44:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:43,266 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2342 transitions. [2021-06-05 13:44:43,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2342 transitions. [2021-06-05 13:44:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:43,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:43,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:43,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 13:44:43,481 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2036942238, now seen corresponding path program 5 times [2021-06-05 13:44:43,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:43,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995464193] [2021-06-05 13:44:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:43,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:43,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995464193] [2021-06-05 13:44:43,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995464193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892701958] [2021-06-05 13:44:43,508 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 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 13:44:43,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:44:43,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:43,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:43,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892701958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:43,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:43,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:43,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472837439] [2021-06-05 13:44:43,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:43,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:43,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:43,627 INFO L87 Difference]: Start difference. First operand 713 states and 2342 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:44,358 INFO L93 Difference]: Finished difference Result 1926 states and 5690 transitions. [2021-06-05 13:44:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:44:44,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:44,365 INFO L225 Difference]: With dead ends: 1926 [2021-06-05 13:44:44,365 INFO L226 Difference]: Without dead ends: 1926 [2021-06-05 13:44:44,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:44:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-05 13:44:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 812. [2021-06-05 13:44:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.347718865598027) internal successors, (2715), 811 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2715 transitions. [2021-06-05 13:44:44,386 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2715 transitions. Word has length 21 [2021-06-05 13:44:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:44,386 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2715 transitions. [2021-06-05 13:44:44,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2715 transitions. [2021-06-05 13:44:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:44,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:44,388 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:44,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 13:44:44,606 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:44,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash 625274526, now seen corresponding path program 2 times [2021-06-05 13:44:44,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:44,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221170253] [2021-06-05 13:44:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:44,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:44,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221170253] [2021-06-05 13:44:44,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221170253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048636140] [2021-06-05 13:44:44,638 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 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 13:44:44,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:44,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:44:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:44,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048636140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:44,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:44,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:44:44,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494960319] [2021-06-05 13:44:44,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:44,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:44,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:44,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:44,776 INFO L87 Difference]: Start difference. First operand 812 states and 2715 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:45,130 INFO L93 Difference]: Finished difference Result 2526 states and 7927 transitions. [2021-06-05 13:44:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:44:45,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:45,139 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 13:44:45,139 INFO L226 Difference]: Without dead ends: 2518 [2021-06-05 13:44:45,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:44:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-06-05 13:44:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1045. [2021-06-05 13:44:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4300766283524906) internal successors, (3581), 1044 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3581 transitions. [2021-06-05 13:44:45,170 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3581 transitions. Word has length 21 [2021-06-05 13:44:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:45,170 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3581 transitions. [2021-06-05 13:44:45,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3581 transitions. [2021-06-05 13:44:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:45,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:45,172 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:45,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:45,385 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:45,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1603831970, now seen corresponding path program 3 times [2021-06-05 13:44:45,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:45,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453018894] [2021-06-05 13:44:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:45,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:45,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453018894] [2021-06-05 13:44:45,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453018894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912029153] [2021-06-05 13:44:45,419 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 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 13:44:45,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:44:45,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:44:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:45,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912029153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:45,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:45,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:44:45,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002054784] [2021-06-05 13:44:45,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:44:45,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:45,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:44:45,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:44:45,519 INFO L87 Difference]: Start difference. First operand 1045 states and 3581 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:45,840 INFO L93 Difference]: Finished difference Result 2671 states and 8447 transitions. [2021-06-05 13:44:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:44:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:45,867 INFO L225 Difference]: With dead ends: 2671 [2021-06-05 13:44:45,867 INFO L226 Difference]: Without dead ends: 2671 [2021-06-05 13:44:45,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:44:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-06-05 13:44:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1037. [2021-06-05 13:44:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.422779922779923) internal successors, (3546), 1036 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3546 transitions. [2021-06-05 13:44:45,896 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3546 transitions. Word has length 21 [2021-06-05 13:44:45,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:45,896 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3546 transitions. [2021-06-05 13:44:45,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3546 transitions. [2021-06-05 13:44:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:45,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:45,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:46,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:46,113 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:46,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1910066590, now seen corresponding path program 6 times [2021-06-05 13:44:46,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:46,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116128958] [2021-06-05 13:44:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:46,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:46,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116128958] [2021-06-05 13:44:46,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116128958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377020725] [2021-06-05 13:44:46,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:44:46,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:44:46,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:46,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377020725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:46,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:46,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:46,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260226391] [2021-06-05 13:44:46,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:46,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:46,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:46,282 INFO L87 Difference]: Start difference. First operand 1037 states and 3546 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:46,743 INFO L93 Difference]: Finished difference Result 1993 states and 6035 transitions. [2021-06-05 13:44:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:44:46,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:46,747 INFO L225 Difference]: With dead ends: 1993 [2021-06-05 13:44:46,748 INFO L226 Difference]: Without dead ends: 1972 [2021-06-05 13:44:46,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:44:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-06-05 13:44:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1033. [2021-06-05 13:44:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.4186046511627906) internal successors, (3528), 1032 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3528 transitions. [2021-06-05 13:44:46,773 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3528 transitions. Word has length 21 [2021-06-05 13:44:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:46,773 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3528 transitions. [2021-06-05 13:44:46,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3528 transitions. [2021-06-05 13:44:46,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:46,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:46,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:46,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 13:44:46,990 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:46,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:46,991 INFO L82 PathProgramCache]: Analyzing trace with hash -178637854, now seen corresponding path program 7 times [2021-06-05 13:44:46,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:46,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897451431] [2021-06-05 13:44:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:47,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:47,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897451431] [2021-06-05 13:44:47,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897451431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894442310] [2021-06-05 13:44:47,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:47,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:47,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:47,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894442310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:47,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:47,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279445707] [2021-06-05 13:44:47,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:47,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:47,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:47,127 INFO L87 Difference]: Start difference. First operand 1033 states and 3528 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:47,525 INFO L93 Difference]: Finished difference Result 1381 states and 4426 transitions. [2021-06-05 13:44:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:44:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:47,528 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 13:44:47,528 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 13:44:47,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:44:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 13:44:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1063. [2021-06-05 13:44:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.4237288135593222) internal successors, (3636), 1062 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3636 transitions. [2021-06-05 13:44:47,550 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3636 transitions. Word has length 21 [2021-06-05 13:44:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:47,550 INFO L482 AbstractCegarLoop]: Abstraction has 1063 states and 3636 transitions. [2021-06-05 13:44:47,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3636 transitions. [2021-06-05 13:44:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:47,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:47,552 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:47,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:47,768 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:47,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1461928802, now seen corresponding path program 8 times [2021-06-05 13:44:47,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:47,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749383724] [2021-06-05 13:44:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:47,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:47,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749383724] [2021-06-05 13:44:47,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749383724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713474977] [2021-06-05 13:44:47,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:47,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:47,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:47,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:47,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713474977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:47,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:47,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:47,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476651908] [2021-06-05 13:44:47,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:47,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:47,905 INFO L87 Difference]: Start difference. First operand 1063 states and 3636 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:48,413 INFO L93 Difference]: Finished difference Result 1755 states and 5386 transitions. [2021-06-05 13:44:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:44:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:48,417 INFO L225 Difference]: With dead ends: 1755 [2021-06-05 13:44:48,417 INFO L226 Difference]: Without dead ends: 1734 [2021-06-05 13:44:48,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 375.2ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:44:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-05 13:44:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1142. [2021-06-05 13:44:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.422436459246275) internal successors, (3905), 1141 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3905 transitions. [2021-06-05 13:44:48,439 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3905 transitions. Word has length 21 [2021-06-05 13:44:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:48,439 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3905 transitions. [2021-06-05 13:44:48,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3905 transitions. [2021-06-05 13:44:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:48,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:48,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:48,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 13:44:48,657 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash -357334110, now seen corresponding path program 9 times [2021-06-05 13:44:48,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:48,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382167801] [2021-06-05 13:44:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:48,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:48,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382167801] [2021-06-05 13:44:48,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382167801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:48,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993553440] [2021-06-05 13:44:48,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:48,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:44:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:48,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993553440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:48,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:48,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:48,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108282520] [2021-06-05 13:44:48,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:48,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:48,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:48,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:48,804 INFO L87 Difference]: Start difference. First operand 1142 states and 3905 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:49,486 INFO L93 Difference]: Finished difference Result 1827 states and 5611 transitions. [2021-06-05 13:44:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 13:44:49,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:49,489 INFO L225 Difference]: With dead ends: 1827 [2021-06-05 13:44:49,490 INFO L226 Difference]: Without dead ends: 1827 [2021-06-05 13:44:49,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 547.3ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:44:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-06-05 13:44:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1142. [2021-06-05 13:44:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.4171779141104293) internal successors, (3899), 1141 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3899 transitions. [2021-06-05 13:44:49,512 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3899 transitions. Word has length 21 [2021-06-05 13:44:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:49,512 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3899 transitions. [2021-06-05 13:44:49,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3899 transitions. [2021-06-05 13:44:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:49,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:49,514 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:49,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:49,730 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:49,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:49,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2049441946, now seen corresponding path program 10 times [2021-06-05 13:44:49,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:49,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533738924] [2021-06-05 13:44:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:49,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:49,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533738924] [2021-06-05 13:44:49,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533738924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49368194] [2021-06-05 13:44:49,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:49,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:49,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:49,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:49,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49368194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:49,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:49,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 13:44:49,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572349166] [2021-06-05 13:44:49,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:49,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:49,836 INFO L87 Difference]: Start difference. First operand 1142 states and 3899 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:49,988 INFO L93 Difference]: Finished difference Result 1785 states and 5662 transitions. [2021-06-05 13:44:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:50,000 INFO L225 Difference]: With dead ends: 1785 [2021-06-05 13:44:50,000 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 13:44:50,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:44:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 13:44:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1158. [2021-06-05 13:44:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3958513396715646) internal successors, (3929), 1157 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3929 transitions. [2021-06-05 13:44:50,024 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3929 transitions. Word has length 21 [2021-06-05 13:44:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:50,025 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3929 transitions. [2021-06-05 13:44:50,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3929 transitions. [2021-06-05 13:44:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:50,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:50,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:50,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 13:44:50,244 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:50,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1449955162, now seen corresponding path program 11 times [2021-06-05 13:44:50,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:50,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821326453] [2021-06-05 13:44:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:50,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:50,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821326453] [2021-06-05 13:44:50,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821326453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073972605] [2021-06-05 13:44:50,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:50,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:50,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:50,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:50,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:50,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073972605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:50,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:50,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:50,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941656778] [2021-06-05 13:44:50,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:50,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:50,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:50,377 INFO L87 Difference]: Start difference. First operand 1158 states and 3929 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:51,131 INFO L93 Difference]: Finished difference Result 2577 states and 7865 transitions. [2021-06-05 13:44:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:44:51,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:51,136 INFO L225 Difference]: With dead ends: 2577 [2021-06-05 13:44:51,136 INFO L226 Difference]: Without dead ends: 2577 [2021-06-05 13:44:51,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=643, Invalid=1807, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:44:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-06-05 13:44:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1259. [2021-06-05 13:44:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4324324324324325) internal successors, (4318), 1258 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4318 transitions. [2021-06-05 13:44:51,165 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4318 transitions. Word has length 21 [2021-06-05 13:44:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:51,165 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4318 transitions. [2021-06-05 13:44:51,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4318 transitions. [2021-06-05 13:44:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:51,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:51,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:51,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 13:44:51,381 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1323079514, now seen corresponding path program 12 times [2021-06-05 13:44:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:51,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697060000] [2021-06-05 13:44:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:51,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:51,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697060000] [2021-06-05 13:44:51,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697060000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:51,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775293225] [2021-06-05 13:44:51,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:51,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:44:51,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:51,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:51,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:51,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775293225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:51,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:51,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:51,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286924182] [2021-06-05 13:44:51,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:51,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:51,519 INFO L87 Difference]: Start difference. First operand 1259 states and 4318 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:51,999 INFO L93 Difference]: Finished difference Result 2270 states and 6943 transitions. [2021-06-05 13:44:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:44:52,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:52,003 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 13:44:52,003 INFO L226 Difference]: Without dead ends: 2249 [2021-06-05 13:44:52,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:44:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-06-05 13:44:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1255. [2021-06-05 13:44:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.4210526315789473) internal successors, (4290), 1254 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4290 transitions. [2021-06-05 13:44:52,027 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4290 transitions. Word has length 21 [2021-06-05 13:44:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:52,027 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4290 transitions. [2021-06-05 13:44:52,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4290 transitions. [2021-06-05 13:44:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:52,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:52,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:52,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 13:44:52,245 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2108532062, now seen corresponding path program 13 times [2021-06-05 13:44:52,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:52,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109267176] [2021-06-05 13:44:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:52,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:52,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109267176] [2021-06-05 13:44:52,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109267176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695714575] [2021-06-05 13:44:52,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:52,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:52,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:52,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695714575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:52,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:52,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:52,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612881530] [2021-06-05 13:44:52,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:52,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:52,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:52,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:52,379 INFO L87 Difference]: Start difference. First operand 1255 states and 4290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:53,158 INFO L93 Difference]: Finished difference Result 2820 states and 8574 transitions. [2021-06-05 13:44:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 13:44:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:53,164 INFO L225 Difference]: With dead ends: 2820 [2021-06-05 13:44:53,164 INFO L226 Difference]: Without dead ends: 2820 [2021-06-05 13:44:53,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 561.7ms TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:44:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-05 13:44:53,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1244. [2021-06-05 13:44:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.423974255832663) internal successors, (4256), 1243 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4256 transitions. [2021-06-05 13:44:53,192 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4256 transitions. Word has length 21 [2021-06-05 13:44:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:53,192 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4256 transitions. [2021-06-05 13:44:53,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4256 transitions. [2021-06-05 13:44:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:53,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:53,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:53,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 13:44:53,425 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:53,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1149753510, now seen corresponding path program 14 times [2021-06-05 13:44:53,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:53,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972800862] [2021-06-05 13:44:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:53,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:53,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972800862] [2021-06-05 13:44:53,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972800862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975741569] [2021-06-05 13:44:53,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:53,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:53,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:53,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:53,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975741569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:53,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:53,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:53,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177460708] [2021-06-05 13:44:53,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:53,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:53,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:53,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:53,584 INFO L87 Difference]: Start difference. First operand 1244 states and 4256 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:54,248 INFO L93 Difference]: Finished difference Result 2539 states and 7790 transitions. [2021-06-05 13:44:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 13:44:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:54,251 INFO L225 Difference]: With dead ends: 2539 [2021-06-05 13:44:54,252 INFO L226 Difference]: Without dead ends: 2539 [2021-06-05 13:44:54,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 452.1ms TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:44:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-06-05 13:44:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1261. [2021-06-05 13:44:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.4063492063492062) internal successors, (4292), 1260 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4292 transitions. [2021-06-05 13:44:54,276 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4292 transitions. Word has length 21 [2021-06-05 13:44:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:54,276 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4292 transitions. [2021-06-05 13:44:54,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4292 transitions. [2021-06-05 13:44:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:54,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:54,278 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:54,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 13:44:54,494 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:54,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1698531494, now seen corresponding path program 15 times [2021-06-05 13:44:54,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:54,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961397950] [2021-06-05 13:44:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:54,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:54,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961397950] [2021-06-05 13:44:54,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961397950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:54,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467691619] [2021-06-05 13:44:54,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:54,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:44:54,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:54,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:54,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:54,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467691619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:54,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:54,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669247751] [2021-06-05 13:44:54,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:54,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:54,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:54,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:54,634 INFO L87 Difference]: Start difference. First operand 1261 states and 4292 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:55,123 INFO L93 Difference]: Finished difference Result 2197 states and 6773 transitions. [2021-06-05 13:44:55,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:44:55,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:55,126 INFO L225 Difference]: With dead ends: 2197 [2021-06-05 13:44:55,126 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 13:44:55,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:44:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 13:44:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1281. [2021-06-05 13:44:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.41640625) internal successors, (4373), 1280 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4373 transitions. [2021-06-05 13:44:55,148 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4373 transitions. Word has length 21 [2021-06-05 13:44:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:55,148 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4373 transitions. [2021-06-05 13:44:55,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4373 transitions. [2021-06-05 13:44:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:55,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:55,150 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:55,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:55,365 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:55,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:55,365 INFO L82 PathProgramCache]: Analyzing trace with hash -593936802, now seen corresponding path program 16 times [2021-06-05 13:44:55,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:55,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899688539] [2021-06-05 13:44:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:55,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:55,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899688539] [2021-06-05 13:44:55,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899688539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:55,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801773612] [2021-06-05 13:44:55,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:55,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:55,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:55,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:55,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801773612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:55,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:55,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:55,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967873544] [2021-06-05 13:44:55,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:55,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:55,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:55,497 INFO L87 Difference]: Start difference. First operand 1281 states and 4373 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:56,040 INFO L93 Difference]: Finished difference Result 2278 states and 7025 transitions. [2021-06-05 13:44:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 13:44:56,041 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:56,044 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 13:44:56,044 INFO L226 Difference]: Without dead ends: 2278 [2021-06-05 13:44:56,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:44:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-06-05 13:44:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1234. [2021-06-05 13:44:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.4184914841849148) internal successors, (4215), 1233 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4215 transitions. [2021-06-05 13:44:56,066 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4215 transitions. Word has length 21 [2021-06-05 13:44:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:56,066 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 4215 transitions. [2021-06-05 13:44:56,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4215 transitions. [2021-06-05 13:44:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:56,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:56,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:56,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 13:44:56,285 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:56,285 INFO L82 PathProgramCache]: Analyzing trace with hash 310598484, now seen corresponding path program 17 times [2021-06-05 13:44:56,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:56,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198314396] [2021-06-05 13:44:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:56,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:56,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198314396] [2021-06-05 13:44:56,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198314396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145926583] [2021-06-05 13:44:56,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:56,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:44:56,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:56,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:56,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145926583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:56,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:44:56,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078216595] [2021-06-05 13:44:56,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:56,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:56,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:56,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:56,396 INFO L87 Difference]: Start difference. First operand 1234 states and 4215 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:56,521 INFO L93 Difference]: Finished difference Result 2607 states and 8438 transitions. [2021-06-05 13:44:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:56,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:56,525 INFO L225 Difference]: With dead ends: 2607 [2021-06-05 13:44:56,525 INFO L226 Difference]: Without dead ends: 2607 [2021-06-05 13:44:56,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-06-05 13:44:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1625. [2021-06-05 13:44:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5086206896551726) internal successors, (5698), 1624 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5698 transitions. [2021-06-05 13:44:56,551 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5698 transitions. Word has length 21 [2021-06-05 13:44:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:56,551 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5698 transitions. [2021-06-05 13:44:56,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5698 transitions. [2021-06-05 13:44:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:56,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:56,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:56,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:56,767 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:56,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:56,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1830655388, now seen corresponding path program 18 times [2021-06-05 13:44:56,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:56,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305696397] [2021-06-05 13:44:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:56,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:56,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305696397] [2021-06-05 13:44:56,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305696397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706673619] [2021-06-05 13:44:56,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:44:56,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:44:56,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:56,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:56,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:56,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706673619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:56,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:56,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 13:44:56,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114280009] [2021-06-05 13:44:56,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:44:56,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:56,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:44:56,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:44:56,854 INFO L87 Difference]: Start difference. First operand 1625 states and 5698 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:56,968 INFO L93 Difference]: Finished difference Result 2392 states and 7815 transitions. [2021-06-05 13:44:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:44:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:56,973 INFO L225 Difference]: With dead ends: 2392 [2021-06-05 13:44:56,973 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 13:44:56,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:44:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 13:44:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1625. [2021-06-05 13:44:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5043103448275863) internal successors, (5691), 1624 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5691 transitions. [2021-06-05 13:44:57,001 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5691 transitions. Word has length 21 [2021-06-05 13:44:57,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:57,002 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5691 transitions. [2021-06-05 13:44:57,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5691 transitions. [2021-06-05 13:44:57,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:57,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:57,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:57,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 13:44:57,221 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash -981176970, now seen corresponding path program 19 times [2021-06-05 13:44:57,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:57,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740767502] [2021-06-05 13:44:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:57,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:57,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740767502] [2021-06-05 13:44:57,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740767502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:57,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329598488] [2021-06-05 13:44:57,249 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 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 13:44:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:57,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:57,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329598488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:57,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:57,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-06-05 13:44:57,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83191227] [2021-06-05 13:44:57,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:57,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:57,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:57,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:57,312 INFO L87 Difference]: Start difference. First operand 1625 states and 5691 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:57,422 INFO L93 Difference]: Finished difference Result 2370 states and 7737 transitions. [2021-06-05 13:44:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:44:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:57,426 INFO L225 Difference]: With dead ends: 2370 [2021-06-05 13:44:57,426 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 13:44:57,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:44:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 13:44:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1669. [2021-06-05 13:44:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4820143884892087) internal successors, (5808), 1668 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5808 transitions. [2021-06-05 13:44:57,450 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5808 transitions. Word has length 21 [2021-06-05 13:44:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:57,450 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5808 transitions. [2021-06-05 13:44:57,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5808 transitions. [2021-06-05 13:44:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:57,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:57,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:57,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 13:44:57,669 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1028833576, now seen corresponding path program 1 times [2021-06-05 13:44:57,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:57,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891129379] [2021-06-05 13:44:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:57,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:57,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891129379] [2021-06-05 13:44:57,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891129379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:57,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84850475] [2021-06-05 13:44:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:44:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:57,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84850475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:57,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:57,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:57,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676800932] [2021-06-05 13:44:57,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:57,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:57,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:57,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:57,807 INFO L87 Difference]: Start difference. First operand 1669 states and 5808 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:58,136 INFO L93 Difference]: Finished difference Result 1877 states and 6328 transitions. [2021-06-05 13:44:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:44:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:58,138 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 13:44:58,138 INFO L226 Difference]: Without dead ends: 1877 [2021-06-05 13:44:58,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:44:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-05 13:44:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1705. [2021-06-05 13:44:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.473004694835681) internal successors, (5918), 1704 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5918 transitions. [2021-06-05 13:44:58,161 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5918 transitions. Word has length 21 [2021-06-05 13:44:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:58,161 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5918 transitions. [2021-06-05 13:44:58,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5918 transitions. [2021-06-05 13:44:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:58,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:58,164 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:58,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 13:44:58,380 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:58,380 INFO L82 PathProgramCache]: Analyzing trace with hash -856277916, now seen corresponding path program 2 times [2021-06-05 13:44:58,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:58,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229989919] [2021-06-05 13:44:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:58,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:58,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229989919] [2021-06-05 13:44:58,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229989919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571926128] [2021-06-05 13:44:58,405 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 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 13:44:58,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:44:58,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:58,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:58,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571926128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:58,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 13:44:58,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95358223] [2021-06-05 13:44:58,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:44:58,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:58,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:44:58,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:44:58,481 INFO L87 Difference]: Start difference. First operand 1705 states and 5918 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:58,565 INFO L93 Difference]: Finished difference Result 2649 states and 8845 transitions. [2021-06-05 13:44:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:44:58,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:58,569 INFO L225 Difference]: With dead ends: 2649 [2021-06-05 13:44:58,569 INFO L226 Difference]: Without dead ends: 2637 [2021-06-05 13:44:58,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:44:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-06-05 13:44:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1869. [2021-06-05 13:44:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.506423982869379) internal successors, (6550), 1868 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6550 transitions. [2021-06-05 13:44:58,599 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6550 transitions. Word has length 21 [2021-06-05 13:44:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:58,599 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6550 transitions. [2021-06-05 13:44:58,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6550 transitions. [2021-06-05 13:44:58,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:58,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:58,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:58,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 13:44:58,809 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1477091936, now seen corresponding path program 3 times [2021-06-05 13:44:58,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:58,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812547396] [2021-06-05 13:44:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:58,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:58,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812547396] [2021-06-05 13:44:58,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812547396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73925282] [2021-06-05 13:44:58,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:44:58,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:44:58,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:58,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:44:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:58,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73925282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:58,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:58,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:44:58,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672651545] [2021-06-05 13:44:58,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:44:58,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:58,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:44:58,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:44:58,942 INFO L87 Difference]: Start difference. First operand 1869 states and 6550 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:59,310 INFO L93 Difference]: Finished difference Result 2373 states and 7764 transitions. [2021-06-05 13:44:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:44:59,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:59,315 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 13:44:59,315 INFO L226 Difference]: Without dead ends: 2365 [2021-06-05 13:44:59,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:44:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-05 13:44:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1911. [2021-06-05 13:44:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.498952879581152) internal successors, (6683), 1910 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6683 transitions. [2021-06-05 13:44:59,352 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6683 transitions. Word has length 21 [2021-06-05 13:44:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:59,353 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 6683 transitions. [2021-06-05 13:44:59,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6683 transitions. [2021-06-05 13:44:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:59,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:59,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:44:59,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 13:44:59,571 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:44:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:44:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1043981668, now seen corresponding path program 4 times [2021-06-05 13:44:59,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:44:59,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766216698] [2021-06-05 13:44:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:44:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:44:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:44:59,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:44:59,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766216698] [2021-06-05 13:44:59,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766216698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:59,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67954052] [2021-06-05 13:44:59,593 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 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 13:44:59,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:44:59,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:44:59,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:44:59,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:44:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:44:59,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67954052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:44:59,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:44:59,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:44:59,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493028505] [2021-06-05 13:44:59,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:44:59,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:44:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:44:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:44:59,679 INFO L87 Difference]: Start difference. First operand 1911 states and 6683 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:44:59,788 INFO L93 Difference]: Finished difference Result 3232 states and 10628 transitions. [2021-06-05 13:44:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:44:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:44:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:44:59,792 INFO L225 Difference]: With dead ends: 3232 [2021-06-05 13:44:59,792 INFO L226 Difference]: Without dead ends: 3232 [2021-06-05 13:44:59,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:44:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-06-05 13:44:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1914. [2021-06-05 13:44:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.4913748039728176) internal successors, (6679), 1913 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6679 transitions. [2021-06-05 13:44:59,822 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6679 transitions. Word has length 21 [2021-06-05 13:44:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:44:59,822 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6679 transitions. [2021-06-05 13:44:59,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:44:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6679 transitions. [2021-06-05 13:44:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:44:59,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:44:59,825 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:00,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:00,033 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:00,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1350216288, now seen corresponding path program 5 times [2021-06-05 13:45:00,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:00,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513375569] [2021-06-05 13:45:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:00,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:00,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513375569] [2021-06-05 13:45:00,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513375569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119940059] [2021-06-05 13:45:00,058 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 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 13:45:00,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:00,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:00,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:00,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119940059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:00,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:00,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951171530] [2021-06-05 13:45:00,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:00,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:00,177 INFO L87 Difference]: Start difference. First operand 1914 states and 6679 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:00,510 INFO L93 Difference]: Finished difference Result 2236 states and 7415 transitions. [2021-06-05 13:45:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:45:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:00,513 INFO L225 Difference]: With dead ends: 2236 [2021-06-05 13:45:00,513 INFO L226 Difference]: Without dead ends: 2222 [2021-06-05 13:45:00,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:00,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-05 13:45:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1921. [2021-06-05 13:45:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.4854166666666666) internal successors, (6692), 1920 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6692 transitions. [2021-06-05 13:45:00,538 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6692 transitions. Word has length 21 [2021-06-05 13:45:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:00,539 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6692 transitions. [2021-06-05 13:45:00,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6692 transitions. [2021-06-05 13:45:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:00,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:00,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:00,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 13:45:00,757 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1951571416, now seen corresponding path program 6 times [2021-06-05 13:45:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:00,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595612569] [2021-06-05 13:45:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:00,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:00,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595612569] [2021-06-05 13:45:00,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595612569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829930521] [2021-06-05 13:45:00,783 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 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 13:45:00,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:00,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:45:00,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:00,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829930521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:00,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:00,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:45:00,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648265005] [2021-06-05 13:45:00,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:45:00,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:00,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:45:00,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:45:00,866 INFO L87 Difference]: Start difference. First operand 1921 states and 6692 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:01,029 INFO L93 Difference]: Finished difference Result 3168 states and 10573 transitions. [2021-06-05 13:45:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:45:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:01,033 INFO L225 Difference]: With dead ends: 3168 [2021-06-05 13:45:01,033 INFO L226 Difference]: Without dead ends: 3168 [2021-06-05 13:45:01,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-06-05 13:45:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2167. [2021-06-05 13:45:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.5036934441366574) internal successors, (7589), 2166 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7589 transitions. [2021-06-05 13:45:01,064 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7589 transitions. Word has length 21 [2021-06-05 13:45:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:01,064 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 7589 transitions. [2021-06-05 13:45:01,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7589 transitions. [2021-06-05 13:45:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:01,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:01,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:01,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 13:45:01,274 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1401139628, now seen corresponding path program 7 times [2021-06-05 13:45:01,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:01,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135623989] [2021-06-05 13:45:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:01,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:01,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135623989] [2021-06-05 13:45:01,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135623989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:01,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801295779] [2021-06-05 13:45:01,303 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 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 13:45:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:01,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:01,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801295779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:01,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:01,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:01,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769527870] [2021-06-05 13:45:01,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:01,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:01,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:01,421 INFO L87 Difference]: Start difference. First operand 2167 states and 7589 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:01,714 INFO L93 Difference]: Finished difference Result 2425 states and 8213 transitions. [2021-06-05 13:45:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:01,718 INFO L225 Difference]: With dead ends: 2425 [2021-06-05 13:45:01,718 INFO L226 Difference]: Without dead ends: 2400 [2021-06-05 13:45:01,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:01,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-05 13:45:01,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2195. [2021-06-05 13:45:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 3.4963536918869647) internal successors, (7671), 2194 states have internal predecessors, (7671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 7671 transitions. [2021-06-05 13:45:01,744 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 7671 transitions. Word has length 21 [2021-06-05 13:45:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:01,744 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 7671 transitions. [2021-06-05 13:45:01,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 7671 transitions. [2021-06-05 13:45:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:01,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:01,747 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:01,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:01,954 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash 727013536, now seen corresponding path program 4 times [2021-06-05 13:45:01,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:01,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043578706] [2021-06-05 13:45:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:02,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:02,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043578706] [2021-06-05 13:45:02,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043578706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:02,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691175337] [2021-06-05 13:45:02,018 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 13:45:02,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:02,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:02,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:45:02,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:02,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691175337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:02,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:02,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:45:02,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887172522] [2021-06-05 13:45:02,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:02,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:02,152 INFO L87 Difference]: Start difference. First operand 2195 states and 7671 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:02,512 INFO L93 Difference]: Finished difference Result 2917 states and 9926 transitions. [2021-06-05 13:45:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:02,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:02,517 INFO L225 Difference]: With dead ends: 2917 [2021-06-05 13:45:02,517 INFO L226 Difference]: Without dead ends: 2917 [2021-06-05 13:45:02,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-05 13:45:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2153. [2021-06-05 13:45:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.4990706319702602) internal successors, (7530), 2152 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7530 transitions. [2021-06-05 13:45:02,556 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7530 transitions. Word has length 21 [2021-06-05 13:45:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:02,556 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7530 transitions. [2021-06-05 13:45:02,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7530 transitions. [2021-06-05 13:45:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:02,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:02,562 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:02,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 13:45:02,765 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:02,765 INFO L82 PathProgramCache]: Analyzing trace with hash 224706792, now seen corresponding path program 5 times [2021-06-05 13:45:02,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:02,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492794681] [2021-06-05 13:45:02,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:02,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:02,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492794681] [2021-06-05 13:45:02,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492794681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:02,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753317857] [2021-06-05 13:45:02,828 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 13:45:02,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:02,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:02,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:45:02,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:02,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753317857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:02,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:02,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:45:02,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481217380] [2021-06-05 13:45:02,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:02,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:02,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:02,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:02,966 INFO L87 Difference]: Start difference. First operand 2153 states and 7530 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:03,355 INFO L93 Difference]: Finished difference Result 3352 states and 11295 transitions. [2021-06-05 13:45:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:03,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:03,365 INFO L225 Difference]: With dead ends: 3352 [2021-06-05 13:45:03,365 INFO L226 Difference]: Without dead ends: 3352 [2021-06-05 13:45:03,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-06-05 13:45:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2168. [2021-06-05 13:45:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.501153668666359) internal successors, (7587), 2167 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 7587 transitions. [2021-06-05 13:45:03,398 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 7587 transitions. Word has length 21 [2021-06-05 13:45:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:03,398 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 7587 transitions. [2021-06-05 13:45:03,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 7587 transitions. [2021-06-05 13:45:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:03,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:03,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:03,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:03,617 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:03,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:03,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1282893464, now seen corresponding path program 8 times [2021-06-05 13:45:03,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:03,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209811200] [2021-06-05 13:45:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:03,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:03,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209811200] [2021-06-05 13:45:03,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209811200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:03,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856632372] [2021-06-05 13:45:03,660 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 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 13:45:03,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:03,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:03,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:03,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856632372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:03,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:03,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:03,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109111408] [2021-06-05 13:45:03,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:03,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:03,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:03,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:03,765 INFO L87 Difference]: Start difference. First operand 2168 states and 7587 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:03,999 INFO L93 Difference]: Finished difference Result 2314 states and 7948 transitions. [2021-06-05 13:45:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:45:04,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:04,003 INFO L225 Difference]: With dead ends: 2314 [2021-06-05 13:45:04,003 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 13:45:04,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 13:45:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2176. [2021-06-05 13:45:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-06-05 13:45:04,028 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-06-05 13:45:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:04,028 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-06-05 13:45:04,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-06-05 13:45:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:04,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:04,031 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:04,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 13:45:04,232 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:04,232 INFO L82 PathProgramCache]: Analyzing trace with hash -834635104, now seen corresponding path program 9 times [2021-06-05 13:45:04,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:04,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583704643] [2021-06-05 13:45:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:04,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:04,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583704643] [2021-06-05 13:45:04,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583704643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:04,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336875677] [2021-06-05 13:45:04,270 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 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 13:45:04,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:04,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:04,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:04,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336875677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:04,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:04,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:04,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944593017] [2021-06-05 13:45:04,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:04,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:04,423 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:04,704 INFO L93 Difference]: Finished difference Result 2505 states and 8386 transitions. [2021-06-05 13:45:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:04,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:04,708 INFO L225 Difference]: With dead ends: 2505 [2021-06-05 13:45:04,708 INFO L226 Difference]: Without dead ends: 2501 [2021-06-05 13:45:04,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-06-05 13:45:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2176. [2021-06-05 13:45:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-06-05 13:45:04,735 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-06-05 13:45:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:04,735 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-06-05 13:45:04,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-06-05 13:45:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:04,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:04,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:04,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 13:45:04,939 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:04,939 INFO L82 PathProgramCache]: Analyzing trace with hash -961510752, now seen corresponding path program 10 times [2021-06-05 13:45:04,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:04,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924334263] [2021-06-05 13:45:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:04,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:04,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924334263] [2021-06-05 13:45:04,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924334263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:04,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083097806] [2021-06-05 13:45:04,974 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 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 13:45:04,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:04,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:05,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083097806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:05,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:05,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:05,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320489858] [2021-06-05 13:45:05,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:05,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:05,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:05,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:05,071 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:05,333 INFO L93 Difference]: Finished difference Result 2440 states and 8233 transitions. [2021-06-05 13:45:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:45:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:05,336 INFO L225 Difference]: With dead ends: 2440 [2021-06-05 13:45:05,336 INFO L226 Difference]: Without dead ends: 2433 [2021-06-05 13:45:05,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-05 13:45:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2160. [2021-06-05 13:45:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 3.5030106530801297) internal successors, (7563), 2159 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 7563 transitions. [2021-06-05 13:45:05,365 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 7563 transitions. Word has length 21 [2021-06-05 13:45:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:05,366 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 7563 transitions. [2021-06-05 13:45:05,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 7563 transitions. [2021-06-05 13:45:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:05,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:05,369 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:05,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 13:45:05,569 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:05,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1953121252, now seen corresponding path program 11 times [2021-06-05 13:45:05,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:05,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682344787] [2021-06-05 13:45:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:05,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:05,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682344787] [2021-06-05 13:45:05,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682344787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:05,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464581214] [2021-06-05 13:45:05,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:45:05,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:05,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:05,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:05,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:05,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464581214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:05,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:05,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:05,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435918695] [2021-06-05 13:45:05,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:05,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:05,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:05,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:05,745 INFO L87 Difference]: Start difference. First operand 2160 states and 7563 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:05,943 INFO L93 Difference]: Finished difference Result 2267 states and 7828 transitions. [2021-06-05 13:45:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:45:05,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:05,947 INFO L225 Difference]: With dead ends: 2267 [2021-06-05 13:45:05,947 INFO L226 Difference]: Without dead ends: 2263 [2021-06-05 13:45:05,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:45:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-05 13:45:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2142. [2021-06-05 13:45:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.505838393274171) internal successors, (7506), 2141 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7506 transitions. [2021-06-05 13:45:05,973 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7506 transitions. Word has length 21 [2021-06-05 13:45:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:05,973 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7506 transitions. [2021-06-05 13:45:05,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7506 transitions. [2021-06-05 13:45:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:05,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:05,976 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:06,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 13:45:06,177 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:06,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:06,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1895235168, now seen corresponding path program 6 times [2021-06-05 13:45:06,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:06,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253370485] [2021-06-05 13:45:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:06,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253370485] [2021-06-05 13:45:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253370485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848398090] [2021-06-05 13:45:06,215 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 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 13:45:06,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:06,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:45:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:06,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848398090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:06,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:06,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:45:06,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358179425] [2021-06-05 13:45:06,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:45:06,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:06,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:45:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:45:06,353 INFO L87 Difference]: Start difference. First operand 2142 states and 7506 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:06,620 INFO L93 Difference]: Finished difference Result 3127 states and 10480 transitions. [2021-06-05 13:45:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:45:06,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:06,625 INFO L225 Difference]: With dead ends: 3127 [2021-06-05 13:45:06,625 INFO L226 Difference]: Without dead ends: 3117 [2021-06-05 13:45:06,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:45:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-06-05 13:45:06,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2142. [2021-06-05 13:45:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.500233535730967) internal successors, (7494), 2141 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7494 transitions. [2021-06-05 13:45:06,657 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7494 transitions. Word has length 21 [2021-06-05 13:45:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:06,657 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7494 transitions. [2021-06-05 13:45:06,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7494 transitions. [2021-06-05 13:45:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:06,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:06,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:06,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:06,865 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:06,865 INFO L82 PathProgramCache]: Analyzing trace with hash -940636012, now seen corresponding path program 12 times [2021-06-05 13:45:06,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:06,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326056618] [2021-06-05 13:45:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:06,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:06,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326056618] [2021-06-05 13:45:06,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326056618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:06,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341711809] [2021-06-05 13:45:06,897 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 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 13:45:06,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:45:06,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:07,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341711809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:07,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:07,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706242593] [2021-06-05 13:45:07,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:07,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:07,023 INFO L87 Difference]: Start difference. First operand 2142 states and 7494 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:07,411 INFO L93 Difference]: Finished difference Result 2611 states and 8731 transitions. [2021-06-05 13:45:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:45:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:07,415 INFO L225 Difference]: With dead ends: 2611 [2021-06-05 13:45:07,416 INFO L226 Difference]: Without dead ends: 2586 [2021-06-05 13:45:07,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:45:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-05 13:45:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2140. [2021-06-05 13:45:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.5002337540906967) internal successors, (7487), 2139 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 7487 transitions. [2021-06-05 13:45:07,448 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 7487 transitions. Word has length 21 [2021-06-05 13:45:07,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:07,448 INFO L482 AbstractCegarLoop]: Abstraction has 2140 states and 7487 transitions. [2021-06-05 13:45:07,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 7487 transitions. [2021-06-05 13:45:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:07,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:07,452 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:07,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 13:45:07,653 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash -121296748, now seen corresponding path program 13 times [2021-06-05 13:45:07,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:07,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108104099] [2021-06-05 13:45:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:07,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108104099] [2021-06-05 13:45:07,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108104099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43239432] [2021-06-05 13:45:07,678 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 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 13:45:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:07,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:07,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:07,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43239432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:07,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:07,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:07,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562246951] [2021-06-05 13:45:07,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:07,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:07,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:07,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:07,791 INFO L87 Difference]: Start difference. First operand 2140 states and 7487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:08,112 INFO L93 Difference]: Finished difference Result 2721 states and 9012 transitions. [2021-06-05 13:45:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:45:08,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:08,116 INFO L225 Difference]: With dead ends: 2721 [2021-06-05 13:45:08,116 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 13:45:08,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 13:45:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2163. [2021-06-05 13:45:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 3.4930619796484734) internal successors, (7552), 2162 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 7552 transitions. [2021-06-05 13:45:08,150 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 7552 transitions. Word has length 21 [2021-06-05 13:45:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:08,150 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 7552 transitions. [2021-06-05 13:45:08,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 7552 transitions. [2021-06-05 13:45:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:08,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:08,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:08,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 13:45:08,354 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:08,354 INFO L82 PathProgramCache]: Analyzing trace with hash 412592784, now seen corresponding path program 14 times [2021-06-05 13:45:08,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:08,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502509321] [2021-06-05 13:45:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:08,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:08,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502509321] [2021-06-05 13:45:08,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502509321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:08,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084576159] [2021-06-05 13:45:08,376 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 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 13:45:08,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:08,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:08,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:08,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:08,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084576159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:08,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:08,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:08,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729063823] [2021-06-05 13:45:08,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:08,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:08,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:08,496 INFO L87 Difference]: Start difference. First operand 2163 states and 7552 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:09,002 INFO L93 Difference]: Finished difference Result 3206 states and 10297 transitions. [2021-06-05 13:45:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:45:09,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:09,007 INFO L225 Difference]: With dead ends: 3206 [2021-06-05 13:45:09,007 INFO L226 Difference]: Without dead ends: 3185 [2021-06-05 13:45:09,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:45:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-06-05 13:45:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2230. [2021-06-05 13:45:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.496186630776133) internal successors, (7793), 2229 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 7793 transitions. [2021-06-05 13:45:09,039 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 7793 transitions. Word has length 21 [2021-06-05 13:45:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:09,039 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 7793 transitions. [2021-06-05 13:45:09,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 7793 transitions. [2021-06-05 13:45:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:09,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:09,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:09,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:09,245 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:09,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1517187476, now seen corresponding path program 15 times [2021-06-05 13:45:09,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:09,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226909798] [2021-06-05 13:45:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:09,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:09,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226909798] [2021-06-05 13:45:09,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226909798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620775612] [2021-06-05 13:45:09,289 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 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 13:45:09,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:45:09,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:09,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:09,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:09,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620775612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:09,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:09,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:09,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575891356] [2021-06-05 13:45:09,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:09,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:09,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:09,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:09,405 INFO L87 Difference]: Start difference. First operand 2230 states and 7793 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:10,155 INFO L93 Difference]: Finished difference Result 3541 states and 11308 transitions. [2021-06-05 13:45:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:45:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:10,160 INFO L225 Difference]: With dead ends: 3541 [2021-06-05 13:45:10,160 INFO L226 Difference]: Without dead ends: 3541 [2021-06-05 13:45:10,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 561.8ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:45:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-06-05 13:45:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2190. [2021-06-05 13:45:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4920054819552306) internal successors, (7644), 2189 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7644 transitions. [2021-06-05 13:45:10,193 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7644 transitions. Word has length 21 [2021-06-05 13:45:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:10,193 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7644 transitions. [2021-06-05 13:45:10,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7644 transitions. [2021-06-05 13:45:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:10,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:10,196 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:10,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 13:45:10,396 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:10,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2061332650, now seen corresponding path program 7 times [2021-06-05 13:45:10,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:10,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785924626] [2021-06-05 13:45:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:10,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:10,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785924626] [2021-06-05 13:45:10,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785924626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622289571] [2021-06-05 13:45:10,432 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 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 13:45:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:45:10,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:10,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622289571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:10,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:10,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:45:10,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408262635] [2021-06-05 13:45:10,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:10,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:10,533 INFO L87 Difference]: Start difference. First operand 2190 states and 7644 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:11,075 INFO L93 Difference]: Finished difference Result 3908 states and 12800 transitions. [2021-06-05 13:45:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:45:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:11,080 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 13:45:11,080 INFO L226 Difference]: Without dead ends: 3900 [2021-06-05 13:45:11,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:45:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-06-05 13:45:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2190. [2021-06-05 13:45:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-06-05 13:45:11,118 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-06-05 13:45:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:11,118 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-06-05 13:45:11,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-06-05 13:45:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:11,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:11,121 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:11,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:11,332 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1082775206, now seen corresponding path program 8 times [2021-06-05 13:45:11,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:11,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059829062] [2021-06-05 13:45:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:11,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:11,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059829062] [2021-06-05 13:45:11,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059829062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524635612] [2021-06-05 13:45:11,359 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:11,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:11,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:45:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:11,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524635612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:11,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:11,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:45:11,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456676005] [2021-06-05 13:45:11,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:11,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:11,472 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:12,004 INFO L93 Difference]: Finished difference Result 4086 states and 13513 transitions. [2021-06-05 13:45:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:45:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:12,013 INFO L225 Difference]: With dead ends: 4086 [2021-06-05 13:45:12,013 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 13:45:12,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:45:12,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 13:45:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2190. [2021-06-05 13:45:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-06-05 13:45:12,048 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-06-05 13:45:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:12,049 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-06-05 13:45:12,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-06-05 13:45:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:12,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:12,051 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:12,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 13:45:12,252 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash 939943326, now seen corresponding path program 9 times [2021-06-05 13:45:12,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:12,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865911810] [2021-06-05 13:45:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:12,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:12,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865911810] [2021-06-05 13:45:12,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865911810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:12,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104854312] [2021-06-05 13:45:12,286 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:45:12,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:45:12,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:12,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:45:12,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:12,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104854312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:12,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:12,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:45:12,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615298601] [2021-06-05 13:45:12,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:12,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:12,382 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:12,751 INFO L93 Difference]: Finished difference Result 3342 states and 11093 transitions. [2021-06-05 13:45:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:45:12,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:12,755 INFO L225 Difference]: With dead ends: 3342 [2021-06-05 13:45:12,755 INFO L226 Difference]: Without dead ends: 3334 [2021-06-05 13:45:12,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-06-05 13:45:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2186. [2021-06-05 13:45:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 3.491075514874142) internal successors, (7628), 2185 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 7628 transitions. [2021-06-05 13:45:12,787 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 7628 transitions. Word has length 21 [2021-06-05 13:45:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:12,787 INFO L482 AbstractCegarLoop]: Abstraction has 2186 states and 7628 transitions. [2021-06-05 13:45:12,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 7628 transitions. [2021-06-05 13:45:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:12,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:12,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:13,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:13,006 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:13,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2053845986, now seen corresponding path program 10 times [2021-06-05 13:45:13,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:13,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994372803] [2021-06-05 13:45:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:13,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:13,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994372803] [2021-06-05 13:45:13,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994372803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067009723] [2021-06-05 13:45:13,033 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 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 13:45:13,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:13,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:13,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:45:13,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:13,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067009723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:13,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:45:13,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944644598] [2021-06-05 13:45:13,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:45:13,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:45:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:45:13,146 INFO L87 Difference]: Start difference. First operand 2186 states and 7628 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:13,418 INFO L93 Difference]: Finished difference Result 3190 states and 10635 transitions. [2021-06-05 13:45:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:13,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:13,423 INFO L225 Difference]: With dead ends: 3190 [2021-06-05 13:45:13,423 INFO L226 Difference]: Without dead ends: 3178 [2021-06-05 13:45:13,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:45:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-06-05 13:45:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2184. [2021-06-05 13:45:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 3.4924415941365092) internal successors, (7624), 2183 states have internal predecessors, (7624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 7624 transitions. [2021-06-05 13:45:13,453 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 7624 transitions. Word has length 21 [2021-06-05 13:45:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:13,453 INFO L482 AbstractCegarLoop]: Abstraction has 2184 states and 7624 transitions. [2021-06-05 13:45:13,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 7624 transitions. [2021-06-05 13:45:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:13,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:13,456 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:13,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 13:45:13,667 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:13,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2052223966, now seen corresponding path program 11 times [2021-06-05 13:45:13,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:13,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116654236] [2021-06-05 13:45:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:13,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116654236] [2021-06-05 13:45:13,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116654236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602087522] [2021-06-05 13:45:13,699 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 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 13:45:13,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:45:13,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:13,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:45:13,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:13,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602087522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:13,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:13,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:45:13,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937685051] [2021-06-05 13:45:13,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:13,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:13,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:13,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:13,803 INFO L87 Difference]: Start difference. First operand 2184 states and 7624 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:14,303 INFO L93 Difference]: Finished difference Result 3630 states and 12185 transitions. [2021-06-05 13:45:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:45:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:14,308 INFO L225 Difference]: With dead ends: 3630 [2021-06-05 13:45:14,308 INFO L226 Difference]: Without dead ends: 3630 [2021-06-05 13:45:14,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:45:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-06-05 13:45:14,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2175. [2021-06-05 13:45:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4894204231830726) internal successors, (7586), 2174 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7586 transitions. [2021-06-05 13:45:14,338 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7586 transitions. Word has length 21 [2021-06-05 13:45:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:14,338 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7586 transitions. [2021-06-05 13:45:14,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7586 transitions. [2021-06-05 13:45:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:45:14,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:14,341 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:14,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 13:45:14,541 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:14,542 INFO L82 PathProgramCache]: Analyzing trace with hash 122801370, now seen corresponding path program 12 times [2021-06-05 13:45:14,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:14,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870344662] [2021-06-05 13:45:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:14,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:14,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870344662] [2021-06-05 13:45:14,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870344662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:14,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120166681] [2021-06-05 13:45:14,580 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:45:14,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:45:14,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:14,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:45:14,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:14,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120166681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:14,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:14,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:45:14,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35299486] [2021-06-05 13:45:14,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:45:14,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:14,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:45:14,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:45:14,671 INFO L87 Difference]: Start difference. First operand 2175 states and 7586 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:15,115 INFO L93 Difference]: Finished difference Result 3456 states and 11495 transitions. [2021-06-05 13:45:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:45:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:45:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:15,121 INFO L225 Difference]: With dead ends: 3456 [2021-06-05 13:45:15,121 INFO L226 Difference]: Without dead ends: 3446 [2021-06-05 13:45:15,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:45:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-05 13:45:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2166. [2021-06-05 13:45:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.4891454965357966) internal successors, (7554), 2165 states have internal predecessors, (7554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7554 transitions. [2021-06-05 13:45:15,154 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7554 transitions. Word has length 21 [2021-06-05 13:45:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:15,154 INFO L482 AbstractCegarLoop]: Abstraction has 2166 states and 7554 transitions. [2021-06-05 13:45:15,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7554 transitions. [2021-06-05 13:45:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:15,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:15,157 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:15,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 13:45:15,357 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:15,357 INFO L82 PathProgramCache]: Analyzing trace with hash -791767740, now seen corresponding path program 20 times [2021-06-05 13:45:15,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:15,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698815436] [2021-06-05 13:45:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:15,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698815436] [2021-06-05 13:45:15,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698815436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230079288] [2021-06-05 13:45:15,420 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 13:45:15,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:15,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:45:15,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:15,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230079288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:15,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:15,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 13:45:15,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706280264] [2021-06-05 13:45:15,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:45:15,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:15,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:45:15,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:15,576 INFO L87 Difference]: Start difference. First operand 2166 states and 7554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:15,742 INFO L93 Difference]: Finished difference Result 3313 states and 11224 transitions. [2021-06-05 13:45:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:45:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:15,747 INFO L225 Difference]: With dead ends: 3313 [2021-06-05 13:45:15,747 INFO L226 Difference]: Without dead ends: 3283 [2021-06-05 13:45:15,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-06-05 13:45:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2707. [2021-06-05 13:45:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 3.5291943828529195) internal successors, (9550), 2706 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 9550 transitions. [2021-06-05 13:45:15,784 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 9550 transitions. Word has length 23 [2021-06-05 13:45:15,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:15,784 INFO L482 AbstractCegarLoop]: Abstraction has 2707 states and 9550 transitions. [2021-06-05 13:45:15,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 9550 transitions. [2021-06-05 13:45:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:15,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:15,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:15,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 13:45:15,988 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:15,988 INFO L82 PathProgramCache]: Analyzing trace with hash -830121990, now seen corresponding path program 21 times [2021-06-05 13:45:15,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:15,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747262565] [2021-06-05 13:45:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:16,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:16,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747262565] [2021-06-05 13:45:16,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747262565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048305106] [2021-06-05 13:45:16,049 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 13:45:16,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:45:16,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:16,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048305106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:16,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:16,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997658172] [2021-06-05 13:45:16,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:16,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:16,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:16,181 INFO L87 Difference]: Start difference. First operand 2707 states and 9550 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:16,334 INFO L93 Difference]: Finished difference Result 3950 states and 13551 transitions. [2021-06-05 13:45:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:45:16,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:45:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:16,341 INFO L225 Difference]: With dead ends: 3950 [2021-06-05 13:45:16,341 INFO L226 Difference]: Without dead ends: 3891 [2021-06-05 13:45:16,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-06-05 13:45:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3295. [2021-06-05 13:45:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.552519732847602) internal successors, (11702), 3294 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11702 transitions. [2021-06-05 13:45:16,387 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11702 transitions. Word has length 23 [2021-06-05 13:45:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:16,387 INFO L482 AbstractCegarLoop]: Abstraction has 3295 states and 11702 transitions. [2021-06-05 13:45:16,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11702 transitions. [2021-06-05 13:45:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:16,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:16,392 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:16,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 13:45:16,605 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:16,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:16,606 INFO L82 PathProgramCache]: Analyzing trace with hash -50344256, now seen corresponding path program 13 times [2021-06-05 13:45:16,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:16,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416107895] [2021-06-05 13:45:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:16,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:16,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416107895] [2021-06-05 13:45:16,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416107895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646064401] [2021-06-05 13:45:16,689 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 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 13:45:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:45:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:16,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646064401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:16,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:16,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:16,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916817175] [2021-06-05 13:45:16,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:16,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:16,842 INFO L87 Difference]: Start difference. First operand 3295 states and 11702 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:17,000 INFO L93 Difference]: Finished difference Result 3639 states and 12726 transitions. [2021-06-05 13:45:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:45:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:45:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:17,005 INFO L225 Difference]: With dead ends: 3639 [2021-06-05 13:45:17,005 INFO L226 Difference]: Without dead ends: 3609 [2021-06-05 13:45:17,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-06-05 13:45:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3359. [2021-06-05 13:45:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 3.5547945205479454) internal successors, (11937), 3358 states have internal predecessors, (11937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 11937 transitions. [2021-06-05 13:45:17,047 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 11937 transitions. Word has length 23 [2021-06-05 13:45:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:17,047 INFO L482 AbstractCegarLoop]: Abstraction has 3359 states and 11937 transitions. [2021-06-05 13:45:17,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 11937 transitions. [2021-06-05 13:45:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:45:17,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:17,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:17,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 13:45:17,252 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:17,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1087752272, now seen corresponding path program 14 times [2021-06-05 13:45:17,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:17,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765300764] [2021-06-05 13:45:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:17,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765300764] [2021-06-05 13:45:17,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765300764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268333538] [2021-06-05 13:45:17,311 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 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 13:45:17,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:17,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:45:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:17,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268333538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:17,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:17,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:45:17,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572673619] [2021-06-05 13:45:17,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:17,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:17,414 INFO L87 Difference]: Start difference. First operand 3359 states and 11937 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:17,532 INFO L93 Difference]: Finished difference Result 3651 states and 12785 transitions. [2021-06-05 13:45:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:45:17,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:45:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:17,537 INFO L225 Difference]: With dead ends: 3651 [2021-06-05 13:45:17,537 INFO L226 Difference]: Without dead ends: 3621 [2021-06-05 13:45:17,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:45:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-06-05 13:45:17,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 3379. [2021-06-05 13:45:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 3.5509177027827117) internal successors, (11995), 3378 states have internal predecessors, (11995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 11995 transitions. [2021-06-05 13:45:17,580 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 11995 transitions. Word has length 23 [2021-06-05 13:45:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:17,581 INFO L482 AbstractCegarLoop]: Abstraction has 3379 states and 11995 transitions. [2021-06-05 13:45:17,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 11995 transitions. [2021-06-05 13:45:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:17,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:17,585 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:17,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:17,785 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash 964052518, now seen corresponding path program 22 times [2021-06-05 13:45:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:17,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756199792] [2021-06-05 13:45:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:17,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756199792] [2021-06-05 13:45:17,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756199792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042450033] [2021-06-05 13:45:17,826 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 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 13:45:17,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:17,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:17,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042450033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:17,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:17,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:45:17,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106436539] [2021-06-05 13:45:17,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:17,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:17,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:17,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:17,933 INFO L87 Difference]: Start difference. First operand 3379 states and 11995 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:18,273 INFO L93 Difference]: Finished difference Result 5445 states and 18470 transitions. [2021-06-05 13:45:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:45:18,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:18,281 INFO L225 Difference]: With dead ends: 5445 [2021-06-05 13:45:18,281 INFO L226 Difference]: Without dead ends: 5445 [2021-06-05 13:45:18,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-06-05 13:45:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 3811. [2021-06-05 13:45:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 3.5700787401574803) internal successors, (13602), 3810 states have internal predecessors, (13602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 13602 transitions. [2021-06-05 13:45:18,342 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 13602 transitions. Word has length 25 [2021-06-05 13:45:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:18,342 INFO L482 AbstractCegarLoop]: Abstraction has 3811 states and 13602 transitions. [2021-06-05 13:45:18,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 13602 transitions. [2021-06-05 13:45:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:18,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:18,348 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:18,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:18,548 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:18,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:18,548 INFO L82 PathProgramCache]: Analyzing trace with hash -717425812, now seen corresponding path program 15 times [2021-06-05 13:45:18,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:18,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996815540] [2021-06-05 13:45:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:18,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996815540] [2021-06-05 13:45:18,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996815540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551256561] [2021-06-05 13:45:18,583 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 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 13:45:18,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:18,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:18,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:45:18,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:18,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551256561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:18,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:18,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:45:18,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880962745] [2021-06-05 13:45:18,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:18,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:18,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:18,713 INFO L87 Difference]: Start difference. First operand 3811 states and 13602 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:19,076 INFO L93 Difference]: Finished difference Result 5828 states and 20213 transitions. [2021-06-05 13:45:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:19,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:19,085 INFO L225 Difference]: With dead ends: 5828 [2021-06-05 13:45:19,086 INFO L226 Difference]: Without dead ends: 5828 [2021-06-05 13:45:19,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:45:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-06-05 13:45:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4033. [2021-06-05 13:45:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 4032 states have (on average 3.5652281746031744) internal successors, (14375), 4032 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 14375 transitions. [2021-06-05 13:45:19,148 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 14375 transitions. Word has length 25 [2021-06-05 13:45:19,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:19,148 INFO L482 AbstractCegarLoop]: Abstraction has 4033 states and 14375 transitions. [2021-06-05 13:45:19,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:19,148 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 14375 transitions. [2021-06-05 13:45:19,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:19,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:19,154 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:19,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:19,369 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash -242410846, now seen corresponding path program 23 times [2021-06-05 13:45:19,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:19,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706104906] [2021-06-05 13:45:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:19,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:19,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706104906] [2021-06-05 13:45:19,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706104906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:19,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69363153] [2021-06-05 13:45:19,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:45:19,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:45:19,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:19,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69363153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:19,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:19,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:45:19,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077360528] [2021-06-05 13:45:19,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:19,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:19,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:19,565 INFO L87 Difference]: Start difference. First operand 4033 states and 14375 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:20,046 INFO L93 Difference]: Finished difference Result 5115 states and 17619 transitions. [2021-06-05 13:45:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:45:20,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:20,055 INFO L225 Difference]: With dead ends: 5115 [2021-06-05 13:45:20,055 INFO L226 Difference]: Without dead ends: 5076 [2021-06-05 13:45:20,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:45:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-05 13:45:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4139. [2021-06-05 13:45:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 3.5623489608506524) internal successors, (14741), 4138 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 14741 transitions. [2021-06-05 13:45:20,124 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 14741 transitions. Word has length 25 [2021-06-05 13:45:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:20,125 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 14741 transitions. [2021-06-05 13:45:20,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 14741 transitions. [2021-06-05 13:45:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:20,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:20,131 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:20,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:20,342 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash -433027746, now seen corresponding path program 24 times [2021-06-05 13:45:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:20,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806930797] [2021-06-05 13:45:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:20,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806930797] [2021-06-05 13:45:20,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806930797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245994116] [2021-06-05 13:45:20,390 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 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 13:45:20,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:20,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:20,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:20,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245994116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:20,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:20,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:45:20,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602536033] [2021-06-05 13:45:20,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:20,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:20,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:20,546 INFO L87 Difference]: Start difference. First operand 4139 states and 14741 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:22,358 INFO L93 Difference]: Finished difference Result 9010 states and 29031 transitions. [2021-06-05 13:45:22,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 13:45:22,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:22,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:22,371 INFO L225 Difference]: With dead ends: 9010 [2021-06-05 13:45:22,371 INFO L226 Difference]: Without dead ends: 9010 [2021-06-05 13:45:22,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1439.1ms TimeCoverageRelationStatistics Valid=2336, Invalid=6784, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 13:45:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-06-05 13:45:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4688. [2021-06-05 13:45:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.5850224023895882) internal successors, (16803), 4687 states have internal predecessors, (16803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16803 transitions. [2021-06-05 13:45:22,466 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16803 transitions. Word has length 25 [2021-06-05 13:45:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:22,466 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 16803 transitions. [2021-06-05 13:45:22,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16803 transitions. [2021-06-05 13:45:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:22,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:22,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:22,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 13:45:22,680 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:22,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1844695458, now seen corresponding path program 16 times [2021-06-05 13:45:22,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:22,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838193055] [2021-06-05 13:45:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:22,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:22,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838193055] [2021-06-05 13:45:22,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838193055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859479594] [2021-06-05 13:45:22,709 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 13:45:22,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:22,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:45:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:22,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859479594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:22,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:22,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:45:22,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927797480] [2021-06-05 13:45:22,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:22,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:22,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:22,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:22,847 INFO L87 Difference]: Start difference. First operand 4688 states and 16803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:23,945 INFO L93 Difference]: Finished difference Result 13558 states and 45474 transitions. [2021-06-05 13:45:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 13:45:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:23,972 INFO L225 Difference]: With dead ends: 13558 [2021-06-05 13:45:23,972 INFO L226 Difference]: Without dead ends: 13548 [2021-06-05 13:45:23,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 13:45:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2021-06-05 13:45:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 6453. [2021-06-05 13:45:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 3.6734345939243647) internal successors, (23701), 6452 states have internal predecessors, (23701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 23701 transitions. [2021-06-05 13:45:24,151 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 23701 transitions. Word has length 25 [2021-06-05 13:45:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:24,151 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 23701 transitions. [2021-06-05 13:45:24,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 23701 transitions. [2021-06-05 13:45:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:24,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:24,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:24,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:24,396 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:24,397 INFO L82 PathProgramCache]: Analyzing trace with hash -866138014, now seen corresponding path program 17 times [2021-06-05 13:45:24,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:24,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626429222] [2021-06-05 13:45:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:24,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:24,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626429222] [2021-06-05 13:45:24,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626429222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790909245] [2021-06-05 13:45:24,439 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 13:45:24,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:45:24,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:24,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:45:24,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:24,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790909245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:24,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:24,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:45:24,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829546749] [2021-06-05 13:45:24,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:45:24,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:45:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:45:24,617 INFO L87 Difference]: Start difference. First operand 6453 states and 23701 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:25,853 INFO L93 Difference]: Finished difference Result 16076 states and 53507 transitions. [2021-06-05 13:45:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 13:45:25,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:25,881 INFO L225 Difference]: With dead ends: 16076 [2021-06-05 13:45:25,882 INFO L226 Difference]: Without dead ends: 16076 [2021-06-05 13:45:25,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 775.1ms TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:45:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-06-05 13:45:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 5550. [2021-06-05 13:45:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.6352495945215355) internal successors, (20172), 5549 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 20172 transitions. [2021-06-05 13:45:26,049 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 20172 transitions. Word has length 25 [2021-06-05 13:45:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:26,049 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 20172 transitions. [2021-06-05 13:45:26,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 20172 transitions. [2021-06-05 13:45:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:26,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:26,058 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:26,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 13:45:26,274 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash -559903394, now seen corresponding path program 25 times [2021-06-05 13:45:26,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:26,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208319094] [2021-06-05 13:45:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:26,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:26,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208319094] [2021-06-05 13:45:26,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208319094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577603756] [2021-06-05 13:45:26,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:45:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:26,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577603756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:26,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:26,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:45:26,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660356944] [2021-06-05 13:45:26,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:26,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:26,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:26,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:26,602 INFO L87 Difference]: Start difference. First operand 5550 states and 20172 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:28,043 INFO L93 Difference]: Finished difference Result 8927 states and 29584 transitions. [2021-06-05 13:45:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 13:45:28,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:28,056 INFO L225 Difference]: With dead ends: 8927 [2021-06-05 13:45:28,057 INFO L226 Difference]: Without dead ends: 8899 [2021-06-05 13:45:28,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1164.2ms TimeCoverageRelationStatistics Valid=1142, Invalid=3148, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 13:45:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8899 states. [2021-06-05 13:45:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8899 to 5452. [2021-06-05 13:45:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 3.642634379013025) internal successors, (19856), 5451 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 19856 transitions. [2021-06-05 13:45:28,170 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 19856 transitions. Word has length 25 [2021-06-05 13:45:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:28,170 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 19856 transitions. [2021-06-05 13:45:28,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 19856 transitions. [2021-06-05 13:45:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:28,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:28,177 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:28,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:28,378 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:28,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1898789474, now seen corresponding path program 26 times [2021-06-05 13:45:28,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:28,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723224118] [2021-06-05 13:45:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:28,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:28,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723224118] [2021-06-05 13:45:28,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723224118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349942642] [2021-06-05 13:45:28,414 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 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 13:45:28,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:28,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:28,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:28,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349942642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:28,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:28,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:45:28,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640132646] [2021-06-05 13:45:28,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:28,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:28,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:28,567 INFO L87 Difference]: Start difference. First operand 5452 states and 19856 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:29,568 INFO L93 Difference]: Finished difference Result 8770 states and 29298 transitions. [2021-06-05 13:45:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 13:45:29,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:29,583 INFO L225 Difference]: With dead ends: 8770 [2021-06-05 13:45:29,583 INFO L226 Difference]: Without dead ends: 8707 [2021-06-05 13:45:29,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 748.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:45:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2021-06-05 13:45:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 5570. [2021-06-05 13:45:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 3.627760818818459) internal successors, (20203), 5569 states have internal predecessors, (20203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 20203 transitions. [2021-06-05 13:45:29,710 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 20203 transitions. Word has length 25 [2021-06-05 13:45:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:29,710 INFO L482 AbstractCegarLoop]: Abstraction has 5570 states and 20203 transitions. [2021-06-05 13:45:29,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 20203 transitions. [2021-06-05 13:45:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:29,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:29,718 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:29,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 13:45:29,919 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1974256990, now seen corresponding path program 27 times [2021-06-05 13:45:29,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:29,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897390701] [2021-06-05 13:45:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:29,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897390701] [2021-06-05 13:45:29,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897390701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402997637] [2021-06-05 13:45:29,956 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 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 13:45:29,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:45:29,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:29,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:30,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402997637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:30,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:30,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:45:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574190725] [2021-06-05 13:45:30,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:30,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:30,087 INFO L87 Difference]: Start difference. First operand 5570 states and 20203 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:30,675 INFO L93 Difference]: Finished difference Result 6773 states and 23756 transitions. [2021-06-05 13:45:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:45:30,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:30,686 INFO L225 Difference]: With dead ends: 6773 [2021-06-05 13:45:30,686 INFO L226 Difference]: Without dead ends: 6734 [2021-06-05 13:45:30,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:45:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-06-05 13:45:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 5761. [2021-06-05 13:45:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 3.6230902777777776) internal successors, (20869), 5760 states have internal predecessors, (20869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 20869 transitions. [2021-06-05 13:45:30,775 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 20869 transitions. Word has length 25 [2021-06-05 13:45:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:30,775 INFO L482 AbstractCegarLoop]: Abstraction has 5761 states and 20869 transitions. [2021-06-05 13:45:30,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 20869 transitions. [2021-06-05 13:45:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:30,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:30,783 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:30,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:30,989 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1733723230, now seen corresponding path program 28 times [2021-06-05 13:45:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:30,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705791306] [2021-06-05 13:45:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:31,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705791306] [2021-06-05 13:45:31,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705791306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468178887] [2021-06-05 13:45:31,022 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:45:31,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:31,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:31,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468178887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:31,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:31,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:45:31,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607236828] [2021-06-05 13:45:31,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:31,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:31,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:31,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:31,199 INFO L87 Difference]: Start difference. First operand 5761 states and 20869 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:32,014 INFO L93 Difference]: Finished difference Result 7641 states and 26156 transitions. [2021-06-05 13:45:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:45:32,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:32,026 INFO L225 Difference]: With dead ends: 7641 [2021-06-05 13:45:32,027 INFO L226 Difference]: Without dead ends: 7578 [2021-06-05 13:45:32,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 655.2ms TimeCoverageRelationStatistics Valid=524, Invalid=2026, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:45:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2021-06-05 13:45:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 6105. [2021-06-05 13:45:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6105 states, 6104 states have (on average 3.6094364351245085) internal successors, (22032), 6104 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6105 states to 6105 states and 22032 transitions. [2021-06-05 13:45:32,128 INFO L78 Accepts]: Start accepts. Automaton has 6105 states and 22032 transitions. Word has length 25 [2021-06-05 13:45:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:32,128 INFO L482 AbstractCegarLoop]: Abstraction has 6105 states and 22032 transitions. [2021-06-05 13:45:32,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6105 states and 22032 transitions. [2021-06-05 13:45:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:32,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:32,136 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:32,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:32,337 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1368777634, now seen corresponding path program 29 times [2021-06-05 13:45:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:32,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073875432] [2021-06-05 13:45:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:32,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:32,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073875432] [2021-06-05 13:45:32,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073875432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934643427] [2021-06-05 13:45:32,378 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 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 13:45:32,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:45:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:32,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934643427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:32,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:32,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:45:32,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7028588] [2021-06-05 13:45:32,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:32,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:32,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:32,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:32,528 INFO L87 Difference]: Start difference. First operand 6105 states and 22032 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:33,596 INFO L93 Difference]: Finished difference Result 8374 states and 28326 transitions. [2021-06-05 13:45:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:45:33,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:33,612 INFO L225 Difference]: With dead ends: 8374 [2021-06-05 13:45:33,612 INFO L226 Difference]: Without dead ends: 8346 [2021-06-05 13:45:33,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=715, Invalid=2591, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 13:45:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-06-05 13:45:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 6450. [2021-06-05 13:45:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.6004031632811286) internal successors, (23219), 6449 states have internal predecessors, (23219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 23219 transitions. [2021-06-05 13:45:33,732 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 23219 transitions. Word has length 25 [2021-06-05 13:45:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:33,732 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 23219 transitions. [2021-06-05 13:45:33,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 23219 transitions. [2021-06-05 13:45:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:33,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:33,741 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:33,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 13:45:33,942 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:33,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:33,942 INFO L82 PathProgramCache]: Analyzing trace with hash -264182942, now seen corresponding path program 30 times [2021-06-05 13:45:33,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:33,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688270618] [2021-06-05 13:45:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:33,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:33,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688270618] [2021-06-05 13:45:33,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688270618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:33,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965591958] [2021-06-05 13:45:33,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:45:34,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:45:34,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:34,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965591958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:34,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:34,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:45:34,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067268843] [2021-06-05 13:45:34,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:45:34,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:34,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:45:34,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:45:34,151 INFO L87 Difference]: Start difference. First operand 6450 states and 23219 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:35,589 INFO L93 Difference]: Finished difference Result 8593 states and 28882 transitions. [2021-06-05 13:45:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:45:35,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:35,607 INFO L225 Difference]: With dead ends: 8593 [2021-06-05 13:45:35,607 INFO L226 Difference]: Without dead ends: 8581 [2021-06-05 13:45:35,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1157.0ms TimeCoverageRelationStatistics Valid=1172, Invalid=4084, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 13:45:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2021-06-05 13:45:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 6369. [2021-06-05 13:45:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 3.5976758793969847) internal successors, (22910), 6368 states have internal predecessors, (22910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 22910 transitions. [2021-06-05 13:45:35,754 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 22910 transitions. Word has length 25 [2021-06-05 13:45:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:35,754 INFO L482 AbstractCegarLoop]: Abstraction has 6369 states and 22910 transitions. [2021-06-05 13:45:35,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:35,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 22910 transitions. [2021-06-05 13:45:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:35,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:35,763 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:35,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:35,964 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:35,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1956290778, now seen corresponding path program 31 times [2021-06-05 13:45:35,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:35,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709141024] [2021-06-05 13:45:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:36,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:36,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709141024] [2021-06-05 13:45:36,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709141024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045030623] [2021-06-05 13:45:36,036 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 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 13:45:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:36,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:36,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045030623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:36,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-06-05 13:45:36,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244815365] [2021-06-05 13:45:36,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:36,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:36,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:36,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:36,147 INFO L87 Difference]: Start difference. First operand 6369 states and 22910 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:36,451 INFO L93 Difference]: Finished difference Result 8392 states and 28777 transitions. [2021-06-05 13:45:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:36,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:36,465 INFO L225 Difference]: With dead ends: 8392 [2021-06-05 13:45:36,465 INFO L226 Difference]: Without dead ends: 8384 [2021-06-05 13:45:36,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:45:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8384 states. [2021-06-05 13:45:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8384 to 6042. [2021-06-05 13:45:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6042 states, 6041 states have (on average 3.577056778679027) internal successors, (21609), 6041 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 21609 transitions. [2021-06-05 13:45:36,579 INFO L78 Accepts]: Start accepts. Automaton has 6042 states and 21609 transitions. Word has length 25 [2021-06-05 13:45:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:36,579 INFO L482 AbstractCegarLoop]: Abstraction has 6042 states and 21609 transitions. [2021-06-05 13:45:36,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6042 states and 21609 transitions. [2021-06-05 13:45:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:36,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:36,591 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:36,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:36,805 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1612048410, now seen corresponding path program 32 times [2021-06-05 13:45:36,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:36,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139183622] [2021-06-05 13:45:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:36,851 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 13:45:36,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:36,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139183622] [2021-06-05 13:45:36,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139183622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133803297] [2021-06-05 13:45:36,852 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 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 13:45:36,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:36,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:36,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:36,981 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 13:45:36,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133803297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:36,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:36,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:36,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731861356] [2021-06-05 13:45:36,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:36,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:36,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:36,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:36,982 INFO L87 Difference]: Start difference. First operand 6042 states and 21609 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:38,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:38,692 INFO L93 Difference]: Finished difference Result 10663 states and 35444 transitions. [2021-06-05 13:45:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 13:45:38,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:38,710 INFO L225 Difference]: With dead ends: 10663 [2021-06-05 13:45:38,710 INFO L226 Difference]: Without dead ends: 10663 [2021-06-05 13:45:38,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1251.3ms TimeCoverageRelationStatistics Valid=1899, Invalid=6111, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:45:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-06-05 13:45:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 6518. [2021-06-05 13:45:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 3.620991253644315) internal successors, (23598), 6517 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 23598 transitions. [2021-06-05 13:45:38,854 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 23598 transitions. Word has length 25 [2021-06-05 13:45:38,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:38,854 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 23598 transitions. [2021-06-05 13:45:38,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 23598 transitions. [2021-06-05 13:45:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:38,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:38,865 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:39,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 13:45:39,066 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1485172762, now seen corresponding path program 33 times [2021-06-05 13:45:39,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:39,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500443713] [2021-06-05 13:45:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:39,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:39,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500443713] [2021-06-05 13:45:39,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500443713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906531086] [2021-06-05 13:45:39,093 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 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 13:45:39,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:39,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:39,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:39,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:39,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906531086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:39,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:39,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:39,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846384224] [2021-06-05 13:45:39,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:39,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:39,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:39,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:39,233 INFO L87 Difference]: Start difference. First operand 6518 states and 23598 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:40,216 INFO L93 Difference]: Finished difference Result 9445 states and 31738 transitions. [2021-06-05 13:45:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:45:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:40,231 INFO L225 Difference]: With dead ends: 9445 [2021-06-05 13:45:40,231 INFO L226 Difference]: Without dead ends: 9417 [2021-06-05 13:45:40,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:45:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2021-06-05 13:45:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 6506. [2021-06-05 13:45:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 6505 states have (on average 3.617524980784012) internal successors, (23532), 6505 states have internal predecessors, (23532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 23532 transitions. [2021-06-05 13:45:40,357 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 23532 transitions. Word has length 25 [2021-06-05 13:45:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:40,358 INFO L482 AbstractCegarLoop]: Abstraction has 6506 states and 23532 transitions. [2021-06-05 13:45:40,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 23532 transitions. [2021-06-05 13:45:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:40,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:40,367 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:40,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:40,568 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:40,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2024341986, now seen corresponding path program 34 times [2021-06-05 13:45:40,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:40,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797994136] [2021-06-05 13:45:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:40,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797994136] [2021-06-05 13:45:40,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797994136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813973362] [2021-06-05 13:45:40,607 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 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 13:45:40,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:40,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:40,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:40,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813973362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:40,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:40,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:40,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864744007] [2021-06-05 13:45:40,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:40,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:40,732 INFO L87 Difference]: Start difference. First operand 6506 states and 23532 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:42,437 INFO L93 Difference]: Finished difference Result 11207 states and 37438 transitions. [2021-06-05 13:45:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 13:45:42,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:42,455 INFO L225 Difference]: With dead ends: 11207 [2021-06-05 13:45:42,455 INFO L226 Difference]: Without dead ends: 11207 [2021-06-05 13:45:42,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1232.6ms TimeCoverageRelationStatistics Valid=1921, Invalid=6089, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:45:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2021-06-05 13:45:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 6511. [2021-06-05 13:45:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6511 states, 6510 states have (on average 3.6225806451612903) internal successors, (23583), 6510 states have internal predecessors, (23583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 23583 transitions. [2021-06-05 13:45:42,598 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 23583 transitions. Word has length 25 [2021-06-05 13:45:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:42,598 INFO L482 AbstractCegarLoop]: Abstraction has 6511 states and 23583 transitions. [2021-06-05 13:45:42,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 23583 transitions. [2021-06-05 13:45:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:42,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:42,607 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:42,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 13:45:42,808 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash -987660262, now seen corresponding path program 35 times [2021-06-05 13:45:42,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:42,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616185293] [2021-06-05 13:45:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:42,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:42,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616185293] [2021-06-05 13:45:42,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616185293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:42,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507250900] [2021-06-05 13:45:42,837 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 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 13:45:42,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:45:42,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:42,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:42,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:42,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507250900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:42,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:42,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:42,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42805576] [2021-06-05 13:45:42,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:42,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:42,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:42,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:42,981 INFO L87 Difference]: Start difference. First operand 6511 states and 23583 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:44,257 INFO L93 Difference]: Finished difference Result 10680 states and 35655 transitions. [2021-06-05 13:45:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:45:44,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:44,274 INFO L225 Difference]: With dead ends: 10680 [2021-06-05 13:45:44,274 INFO L226 Difference]: Without dead ends: 10668 [2021-06-05 13:45:44,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 937.3ms TimeCoverageRelationStatistics Valid=1285, Invalid=3545, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:45:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-06-05 13:45:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 6551. [2021-06-05 13:45:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6551 states, 6550 states have (on average 3.612671755725191) internal successors, (23663), 6550 states have internal predecessors, (23663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 23663 transitions. [2021-06-05 13:45:44,409 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 23663 transitions. Word has length 25 [2021-06-05 13:45:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:44,409 INFO L482 AbstractCegarLoop]: Abstraction has 6551 states and 23663 transitions. [2021-06-05 13:45:44,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 23663 transitions. [2021-06-05 13:45:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:44,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:44,419 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:44,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 13:45:44,622 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:44,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1536438246, now seen corresponding path program 36 times [2021-06-05 13:45:44,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:44,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811447602] [2021-06-05 13:45:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:44,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:44,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811447602] [2021-06-05 13:45:44,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811447602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:44,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251937891] [2021-06-05 13:45:44,648 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 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 13:45:44,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:45:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:44,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:44,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:44,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251937891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:44,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:44,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:44,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930621572] [2021-06-05 13:45:44,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:44,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:44,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:44,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:44,795 INFO L87 Difference]: Start difference. First operand 6551 states and 23663 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:45,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:45,791 INFO L93 Difference]: Finished difference Result 9675 states and 32431 transitions. [2021-06-05 13:45:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:45:45,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:45,806 INFO L225 Difference]: With dead ends: 9675 [2021-06-05 13:45:45,807 INFO L226 Difference]: Without dead ends: 9654 [2021-06-05 13:45:45,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 688.8ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:45:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9654 states. [2021-06-05 13:45:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 6620. [2021-06-05 13:45:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 3.6132346275872487) internal successors, (23916), 6619 states have internal predecessors, (23916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 23916 transitions. [2021-06-05 13:45:45,934 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 23916 transitions. Word has length 25 [2021-06-05 13:45:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:45,934 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 23916 transitions. [2021-06-05 13:45:45,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 23916 transitions. [2021-06-05 13:45:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:45,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:45,944 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:46,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 13:45:46,144 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:46,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:46,144 INFO L82 PathProgramCache]: Analyzing trace with hash -431843554, now seen corresponding path program 37 times [2021-06-05 13:45:46,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:46,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079824585] [2021-06-05 13:45:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:46,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:46,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079824585] [2021-06-05 13:45:46,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079824585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115066148] [2021-06-05 13:45:46,182 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 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 13:45:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:46,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:46,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:46,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115066148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:46,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:46,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:46,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706554716] [2021-06-05 13:45:46,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:46,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:46,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:46,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:46,314 INFO L87 Difference]: Start difference. First operand 6620 states and 23916 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:47,607 INFO L93 Difference]: Finished difference Result 10253 states and 33929 transitions. [2021-06-05 13:45:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:45:47,607 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:47,623 INFO L225 Difference]: With dead ends: 10253 [2021-06-05 13:45:47,623 INFO L226 Difference]: Without dead ends: 10241 [2021-06-05 13:45:47,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 956.1ms TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 13:45:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-06-05 13:45:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 6509. [2021-06-05 13:45:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.610018438844499) internal successors, (23494), 6508 states have internal predecessors, (23494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 23494 transitions. [2021-06-05 13:45:47,746 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 23494 transitions. Word has length 25 [2021-06-05 13:45:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:47,746 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 23494 transitions. [2021-06-05 13:45:47,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 23494 transitions. [2021-06-05 13:45:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:47,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:47,755 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:47,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:47,955 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:47,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:47,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1498494430, now seen corresponding path program 38 times [2021-06-05 13:45:47,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:47,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686820566] [2021-06-05 13:45:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:47,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:47,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686820566] [2021-06-05 13:45:47,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686820566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:47,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735976720] [2021-06-05 13:45:47,993 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 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 13:45:48,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:48,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:48,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:48,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:48,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735976720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:48,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:48,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:48,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380069871] [2021-06-05 13:45:48,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:48,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:48,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:48,133 INFO L87 Difference]: Start difference. First operand 6509 states and 23494 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:48,935 INFO L93 Difference]: Finished difference Result 10693 states and 36403 transitions. [2021-06-05 13:45:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:45:48,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:48,954 INFO L225 Difference]: With dead ends: 10693 [2021-06-05 13:45:48,954 INFO L226 Difference]: Without dead ends: 10630 [2021-06-05 13:45:48,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 564.3ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:45:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10630 states. [2021-06-05 13:45:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10630 to 7017. [2021-06-05 13:45:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 3.6458095781071838) internal successors, (25579), 7016 states have internal predecessors, (25579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 25579 transitions. [2021-06-05 13:45:49,149 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 25579 transitions. Word has length 25 [2021-06-05 13:45:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:49,149 INFO L482 AbstractCegarLoop]: Abstraction has 7017 states and 25579 transitions. [2021-06-05 13:45:49,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 25579 transitions. [2021-06-05 13:45:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:49,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:49,160 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:49,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:49,361 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash -964604898, now seen corresponding path program 39 times [2021-06-05 13:45:49,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:49,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774162697] [2021-06-05 13:45:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:49,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:49,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774162697] [2021-06-05 13:45:49,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774162697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330213598] [2021-06-05 13:45:49,399 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 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 13:45:49,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:49,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:49,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:49,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:49,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330213598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:49,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:49,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:49,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617102945] [2021-06-05 13:45:49,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:49,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:49,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:49,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:49,565 INFO L87 Difference]: Start difference. First operand 7017 states and 25579 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:50,615 INFO L93 Difference]: Finished difference Result 11280 states and 38187 transitions. [2021-06-05 13:45:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:45:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:50,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:50,634 INFO L225 Difference]: With dead ends: 11280 [2021-06-05 13:45:50,634 INFO L226 Difference]: Without dead ends: 11245 [2021-06-05 13:45:50,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=900, Invalid=2522, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:45:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11245 states. [2021-06-05 13:45:50,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11245 to 7482. [2021-06-05 13:45:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7482 states, 7481 states have (on average 3.6388183397941454) internal successors, (27222), 7481 states have internal predecessors, (27222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:50,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 27222 transitions. [2021-06-05 13:45:50,774 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 27222 transitions. Word has length 25 [2021-06-05 13:45:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:50,775 INFO L482 AbstractCegarLoop]: Abstraction has 7482 states and 27222 transitions. [2021-06-05 13:45:50,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 27222 transitions. [2021-06-05 13:45:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:50,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:50,784 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:50,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:50,985 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash 139989794, now seen corresponding path program 40 times [2021-06-05 13:45:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:50,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373861057] [2021-06-05 13:45:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:51,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:51,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373861057] [2021-06-05 13:45:51,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373861057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:51,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156657312] [2021-06-05 13:45:51,012 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 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 13:45:51,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:51,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:51,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156657312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:51,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:51,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:51,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063831887] [2021-06-05 13:45:51,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:51,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:51,141 INFO L87 Difference]: Start difference. First operand 7482 states and 27222 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:52,436 INFO L93 Difference]: Finished difference Result 11657 states and 39077 transitions. [2021-06-05 13:45:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:45:52,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:52,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:52,456 INFO L225 Difference]: With dead ends: 11657 [2021-06-05 13:45:52,456 INFO L226 Difference]: Without dead ends: 11645 [2021-06-05 13:45:52,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 958.3ms TimeCoverageRelationStatistics Valid=1345, Invalid=3767, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 13:45:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2021-06-05 13:45:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 7340. [2021-06-05 13:45:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.637825316800654) internal successors, (26698), 7339 states have internal predecessors, (26698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 26698 transitions. [2021-06-05 13:45:52,596 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 26698 transitions. Word has length 25 [2021-06-05 13:45:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:52,596 INFO L482 AbstractCegarLoop]: Abstraction has 7340 states and 26698 transitions. [2021-06-05 13:45:52,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 26698 transitions. [2021-06-05 13:45:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:52,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:52,606 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:52,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:52,806 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:52,806 INFO L82 PathProgramCache]: Analyzing trace with hash -553709480, now seen corresponding path program 41 times [2021-06-05 13:45:52,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:52,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376790183] [2021-06-05 13:45:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:52,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:52,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376790183] [2021-06-05 13:45:52,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376790183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:52,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685130085] [2021-06-05 13:45:52,836 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 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 13:45:52,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:45:52,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:52,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685130085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:52,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:52,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 13:45:52,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533934176] [2021-06-05 13:45:52,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:52,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:52,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:52,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:52,915 INFO L87 Difference]: Start difference. First operand 7340 states and 26698 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:53,225 INFO L93 Difference]: Finished difference Result 17556 states and 60790 transitions. [2021-06-05 13:45:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:45:53,225 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:53,257 INFO L225 Difference]: With dead ends: 17556 [2021-06-05 13:45:53,257 INFO L226 Difference]: Without dead ends: 17556 [2021-06-05 13:45:53,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:45:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-06-05 13:45:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 10339. [2021-06-05 13:45:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 3.74530857032308) internal successors, (38719), 10338 states have internal predecessors, (38719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 38719 transitions. [2021-06-05 13:45:53,508 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 38719 transitions. Word has length 25 [2021-06-05 13:45:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:53,508 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 38719 transitions. [2021-06-05 13:45:53,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 38719 transitions. [2021-06-05 13:45:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:53,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:53,523 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:53,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 13:45:53,724 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:53,725 INFO L82 PathProgramCache]: Analyzing trace with hash 966347424, now seen corresponding path program 42 times [2021-06-05 13:45:53,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:53,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154112540] [2021-06-05 13:45:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:53,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:53,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154112540] [2021-06-05 13:45:53,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154112540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564116711] [2021-06-05 13:45:53,755 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:53,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:45:53,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:53,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564116711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:53,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:53,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 13:45:53,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509314612] [2021-06-05 13:45:53,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:45:53,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:53,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:45:53,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:45:53,829 INFO L87 Difference]: Start difference. First operand 10339 states and 38719 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:54,118 INFO L93 Difference]: Finished difference Result 14487 states and 51045 transitions. [2021-06-05 13:45:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:45:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:54,144 INFO L225 Difference]: With dead ends: 14487 [2021-06-05 13:45:54,145 INFO L226 Difference]: Without dead ends: 14473 [2021-06-05 13:45:54,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:45:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-06-05 13:45:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 9632. [2021-06-05 13:45:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 3.7334648530786003) internal successors, (35957), 9631 states have internal predecessors, (35957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 35957 transitions. [2021-06-05 13:45:54,335 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 35957 transitions. Word has length 25 [2021-06-05 13:45:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:54,335 INFO L482 AbstractCegarLoop]: Abstraction has 9632 states and 35957 transitions. [2021-06-05 13:45:54,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:54,335 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 35957 transitions. [2021-06-05 13:45:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:54,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:54,349 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:54,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:54,550 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:54,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1845484934, now seen corresponding path program 43 times [2021-06-05 13:45:54,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:54,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903421104] [2021-06-05 13:45:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:54,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:54,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903421104] [2021-06-05 13:45:54,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903421104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472432517] [2021-06-05 13:45:54,584 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 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 13:45:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:45:54,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:54,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472432517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:54,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:54,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-05 13:45:54,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476738020] [2021-06-05 13:45:54,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:45:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:45:54,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:45:54,658 INFO L87 Difference]: Start difference. First operand 9632 states and 35957 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 13:45:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:54,947 INFO L93 Difference]: Finished difference Result 13632 states and 47869 transitions. [2021-06-05 13:45:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:45:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 25 [2021-06-05 13:45:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:54,974 INFO L225 Difference]: With dead ends: 13632 [2021-06-05 13:45:54,975 INFO L226 Difference]: Without dead ends: 13610 [2021-06-05 13:45:54,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:45:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2021-06-05 13:45:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 8431. [2021-06-05 13:45:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.7080664294187424) internal successors, (31259), 8430 states have internal predecessors, (31259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 31259 transitions. [2021-06-05 13:45:55,179 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 31259 transitions. Word has length 25 [2021-06-05 13:45:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:55,179 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 31259 transitions. [2021-06-05 13:45:55,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 13:45:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 31259 transitions. [2021-06-05 13:45:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:55,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:55,191 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:55,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:55,391 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:55,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1748642604, now seen corresponding path program 44 times [2021-06-05 13:45:55,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:55,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595941503] [2021-06-05 13:45:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:55,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:55,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595941503] [2021-06-05 13:45:55,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595941503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:55,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556621304] [2021-06-05 13:45:55,419 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 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 13:45:55,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:45:55,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:55,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:55,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:55,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556621304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:55,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:55,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:55,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791525012] [2021-06-05 13:45:55,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:55,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:55,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:55,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:55,548 INFO L87 Difference]: Start difference. First operand 8431 states and 31259 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:57,222 INFO L93 Difference]: Finished difference Result 12080 states and 41798 transitions. [2021-06-05 13:45:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 13:45:57,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:57,242 INFO L225 Difference]: With dead ends: 12080 [2021-06-05 13:45:57,242 INFO L226 Difference]: Without dead ends: 12080 [2021-06-05 13:45:57,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1244.0ms TimeCoverageRelationStatistics Valid=1834, Invalid=6176, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:45:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-06-05 13:45:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 8456. [2021-06-05 13:45:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8456 states, 8455 states have (on average 3.710348905972797) internal successors, (31371), 8455 states have internal predecessors, (31371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8456 states to 8456 states and 31371 transitions. [2021-06-05 13:45:57,417 INFO L78 Accepts]: Start accepts. Automaton has 8456 states and 31371 transitions. Word has length 25 [2021-06-05 13:45:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:57,417 INFO L482 AbstractCegarLoop]: Abstraction has 8456 states and 31371 transitions. [2021-06-05 13:45:57,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 8456 states and 31371 transitions. [2021-06-05 13:45:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:57,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:57,429 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:57,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 13:45:57,630 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:57,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1875518252, now seen corresponding path program 45 times [2021-06-05 13:45:57,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:57,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911587596] [2021-06-05 13:45:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:57,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:57,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911587596] [2021-06-05 13:45:57,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911587596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521562473] [2021-06-05 13:45:57,664 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 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 13:45:57,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:45:57,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:57,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:57,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:57,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521562473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:57,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:57,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:57,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238303612] [2021-06-05 13:45:57,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:57,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:57,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:57,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:57,799 INFO L87 Difference]: Start difference. First operand 8456 states and 31371 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:45:58,849 INFO L93 Difference]: Finished difference Result 10961 states and 38403 transitions. [2021-06-05 13:45:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 13:45:58,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:45:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:45:58,867 INFO L225 Difference]: With dead ends: 10961 [2021-06-05 13:45:58,867 INFO L226 Difference]: Without dead ends: 10947 [2021-06-05 13:45:58,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 766.8ms TimeCoverageRelationStatistics Valid=885, Invalid=2655, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 13:45:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2021-06-05 13:45:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 8438. [2021-06-05 13:45:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8438 states, 8437 states have (on average 3.7093753703923196) internal successors, (31296), 8437 states have internal predecessors, (31296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 31296 transitions. [2021-06-05 13:45:59,080 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 31296 transitions. Word has length 25 [2021-06-05 13:45:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:45:59,080 INFO L482 AbstractCegarLoop]: Abstraction has 8438 states and 31296 transitions. [2021-06-05 13:45:59,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:45:59,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 31296 transitions. [2021-06-05 13:45:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:45:59,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:45:59,093 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:45:59,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:45:59,294 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:45:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:45:59,294 INFO L82 PathProgramCache]: Analyzing trace with hash 583174616, now seen corresponding path program 46 times [2021-06-05 13:45:59,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:45:59,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449306088] [2021-06-05 13:45:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:45:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:45:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:45:59,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:45:59,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449306088] [2021-06-05 13:45:59,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449306088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260173032] [2021-06-05 13:45:59,329 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 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 13:45:59,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:45:59,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:45:59,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:45:59,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:45:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:45:59,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260173032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:45:59,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:45:59,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:45:59,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298211401] [2021-06-05 13:45:59,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:45:59,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:45:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:45:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:45:59,462 INFO L87 Difference]: Start difference. First operand 8438 states and 31296 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:00,337 INFO L93 Difference]: Finished difference Result 10752 states and 37881 transitions. [2021-06-05 13:46:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:46:00,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:00,356 INFO L225 Difference]: With dead ends: 10752 [2021-06-05 13:46:00,356 INFO L226 Difference]: Without dead ends: 10689 [2021-06-05 13:46:00,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:46:00,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-06-05 13:46:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 8433. [2021-06-05 13:46:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 8432 states have (on average 3.7100332068311195) internal successors, (31283), 8432 states have internal predecessors, (31283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 31283 transitions. [2021-06-05 13:46:00,517 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 31283 transitions. Word has length 25 [2021-06-05 13:46:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:00,517 INFO L482 AbstractCegarLoop]: Abstraction has 8433 states and 31283 transitions. [2021-06-05 13:46:00,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 31283 transitions. [2021-06-05 13:46:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:00,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:00,530 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:00,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 13:46:00,730 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:00,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:00,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1910600748, now seen corresponding path program 18 times [2021-06-05 13:46:00,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:00,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355980294] [2021-06-05 13:46:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:00,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:00,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355980294] [2021-06-05 13:46:00,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355980294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61748524] [2021-06-05 13:46:00,765 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 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 13:46:00,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:00,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:00,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:00,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61748524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:00,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:00,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:00,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724049676] [2021-06-05 13:46:00,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:00,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:00,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:00,905 INFO L87 Difference]: Start difference. First operand 8433 states and 31283 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:01,712 INFO L93 Difference]: Finished difference Result 9191 states and 33180 transitions. [2021-06-05 13:46:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:46:01,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:01,768 INFO L225 Difference]: With dead ends: 9191 [2021-06-05 13:46:01,768 INFO L226 Difference]: Without dead ends: 9187 [2021-06-05 13:46:01,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:46:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-06-05 13:46:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 8523. [2021-06-05 13:46:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8523 states, 8522 states have (on average 3.701243839474302) internal successors, (31542), 8522 states have internal predecessors, (31542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 31542 transitions. [2021-06-05 13:46:01,889 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 31542 transitions. Word has length 25 [2021-06-05 13:46:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:01,889 INFO L482 AbstractCegarLoop]: Abstraction has 8523 states and 31542 transitions. [2021-06-05 13:46:01,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 31542 transitions. [2021-06-05 13:46:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:01,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:01,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:02,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:02,102 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:02,102 INFO L82 PathProgramCache]: Analyzing trace with hash 25489256, now seen corresponding path program 19 times [2021-06-05 13:46:02,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:02,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516337615] [2021-06-05 13:46:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:02,135 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 13:46:02,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516337615] [2021-06-05 13:46:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516337615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888790662] [2021-06-05 13:46:02,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:46:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:02,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:02,247 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 13:46:02,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888790662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:02,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:02,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:46:02,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999376282] [2021-06-05 13:46:02,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:02,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:02,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:02,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:02,248 INFO L87 Difference]: Start difference. First operand 8523 states and 31542 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:02,830 INFO L93 Difference]: Finished difference Result 19794 states and 70007 transitions. [2021-06-05 13:46:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:46:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:02,866 INFO L225 Difference]: With dead ends: 19794 [2021-06-05 13:46:02,867 INFO L226 Difference]: Without dead ends: 19766 [2021-06-05 13:46:02,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:46:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19766 states. [2021-06-05 13:46:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19766 to 9783. [2021-06-05 13:46:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 9782 states have (on average 3.736659169903905) internal successors, (36552), 9782 states have internal predecessors, (36552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 36552 transitions. [2021-06-05 13:46:03,113 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 36552 transitions. Word has length 25 [2021-06-05 13:46:03,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:03,114 INFO L482 AbstractCegarLoop]: Abstraction has 9783 states and 36552 transitions. [2021-06-05 13:46:03,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 36552 transitions. [2021-06-05 13:46:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:03,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:03,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:03,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-06-05 13:46:03,331 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:03,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1925748840, now seen corresponding path program 20 times [2021-06-05 13:46:03,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:03,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765339604] [2021-06-05 13:46:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:03,360 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 13:46:03,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:03,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765339604] [2021-06-05 13:46:03,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765339604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245026562] [2021-06-05 13:46:03,360 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 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 13:46:03,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:03,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:03,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:03,496 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 13:46:03,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245026562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:03,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:03,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:03,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334615183] [2021-06-05 13:46:03,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:03,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:03,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:03,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:03,497 INFO L87 Difference]: Start difference. First operand 9783 states and 36552 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:04,130 INFO L93 Difference]: Finished difference Result 24314 states and 85958 transitions. [2021-06-05 13:46:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:46:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:04,179 INFO L225 Difference]: With dead ends: 24314 [2021-06-05 13:46:04,179 INFO L226 Difference]: Without dead ends: 24300 [2021-06-05 13:46:04,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 380.7ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:46:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24300 states. [2021-06-05 13:46:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24300 to 11688. [2021-06-05 13:46:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11688 states, 11687 states have (on average 3.7396252246085395) internal successors, (43705), 11687 states have internal predecessors, (43705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 43705 transitions. [2021-06-05 13:46:04,480 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 43705 transitions. Word has length 25 [2021-06-05 13:46:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:04,480 INFO L482 AbstractCegarLoop]: Abstraction has 11688 states and 43705 transitions. [2021-06-05 13:46:04,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 43705 transitions. [2021-06-05 13:46:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:04,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:04,499 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:04,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:04,699 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:04,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2062983836, now seen corresponding path program 21 times [2021-06-05 13:46:04,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:04,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137069412] [2021-06-05 13:46:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:04,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:04,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137069412] [2021-06-05 13:46:04,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137069412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599829975] [2021-06-05 13:46:04,744 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 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 13:46:04,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:46:04,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:04,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599829975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:04,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:04,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:46:04,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453498356] [2021-06-05 13:46:04,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:04,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:04,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:04,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:04,876 INFO L87 Difference]: Start difference. First operand 11688 states and 43705 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:05,604 INFO L93 Difference]: Finished difference Result 12255 states and 45097 transitions. [2021-06-05 13:46:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:46:05,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:05,632 INFO L225 Difference]: With dead ends: 12255 [2021-06-05 13:46:05,632 INFO L226 Difference]: Without dead ends: 12241 [2021-06-05 13:46:05,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:46:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-06-05 13:46:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11650. [2021-06-05 13:46:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 3.7421237874495663) internal successors, (43592), 11649 states have internal predecessors, (43592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 43592 transitions. [2021-06-05 13:46:05,802 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 43592 transitions. Word has length 25 [2021-06-05 13:46:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:05,802 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 43592 transitions. [2021-06-05 13:46:05,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 43592 transitions. [2021-06-05 13:46:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:05,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:05,817 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:06,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 13:46:06,018 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -519372456, now seen corresponding path program 22 times [2021-06-05 13:46:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:06,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318532191] [2021-06-05 13:46:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:06,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:06,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318532191] [2021-06-05 13:46:06,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318532191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368058929] [2021-06-05 13:46:06,052 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 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 13:46:06,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:06,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:06,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:06,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368058929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:06,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:06,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:06,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568639785] [2021-06-05 13:46:06,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:06,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:06,257 INFO L87 Difference]: Start difference. First operand 11650 states and 43592 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:06,937 INFO L93 Difference]: Finished difference Result 12450 states and 45603 transitions. [2021-06-05 13:46:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:46:06,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:06,963 INFO L225 Difference]: With dead ends: 12450 [2021-06-05 13:46:06,963 INFO L226 Difference]: Without dead ends: 12408 [2021-06-05 13:46:06,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:46:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2021-06-05 13:46:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 11734. [2021-06-05 13:46:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11734 states, 11733 states have (on average 3.737151623625671) internal successors, (43848), 11733 states have internal predecessors, (43848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 43848 transitions. [2021-06-05 13:46:07,161 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 43848 transitions. Word has length 25 [2021-06-05 13:46:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:07,161 INFO L482 AbstractCegarLoop]: Abstraction has 11734 states and 43848 transitions. [2021-06-05 13:46:07,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 43848 transitions. [2021-06-05 13:46:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:07,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:07,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:07,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:07,380 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377428, now seen corresponding path program 23 times [2021-06-05 13:46:07,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:07,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207275504] [2021-06-05 13:46:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:07,415 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 13:46:07,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:07,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207275504] [2021-06-05 13:46:07,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207275504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:07,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452039678] [2021-06-05 13:46:07,415 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 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 13:46:07,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:07,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:07,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:07,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:07,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452039678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:07,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:07,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:46:07,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386388258] [2021-06-05 13:46:07,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:07,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:07,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:07,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:07,531 INFO L87 Difference]: Start difference. First operand 11734 states and 43848 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:08,042 INFO L93 Difference]: Finished difference Result 15314 states and 55511 transitions. [2021-06-05 13:46:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:46:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:08,071 INFO L225 Difference]: With dead ends: 15314 [2021-06-05 13:46:08,071 INFO L226 Difference]: Without dead ends: 15307 [2021-06-05 13:46:08,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:46:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15307 states. [2021-06-05 13:46:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15307 to 11671. [2021-06-05 13:46:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 3.739331619537275) internal successors, (43638), 11670 states have internal predecessors, (43638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 43638 transitions. [2021-06-05 13:46:08,327 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 43638 transitions. Word has length 25 [2021-06-05 13:46:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:08,327 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 43638 transitions. [2021-06-05 13:46:08,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 43638 transitions. [2021-06-05 13:46:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:08,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:08,345 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:08,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:08,552 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:08,552 INFO L82 PathProgramCache]: Analyzing trace with hash 22577300, now seen corresponding path program 24 times [2021-06-05 13:46:08,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:08,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798691810] [2021-06-05 13:46:08,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:08,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:08,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798691810] [2021-06-05 13:46:08,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798691810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246748922] [2021-06-05 13:46:08,588 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 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 13:46:08,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:46:08,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:08,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:08,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246748922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:08,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:08,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:08,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951232746] [2021-06-05 13:46:08,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:08,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:08,733 INFO L87 Difference]: Start difference. First operand 11671 states and 43638 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:09,214 INFO L93 Difference]: Finished difference Result 12355 states and 45427 transitions. [2021-06-05 13:46:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:46:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:09,238 INFO L225 Difference]: With dead ends: 12355 [2021-06-05 13:46:09,238 INFO L226 Difference]: Without dead ends: 12316 [2021-06-05 13:46:09,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:46:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12316 states. [2021-06-05 13:46:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12316 to 11732. [2021-06-05 13:46:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.734634728497144) internal successors, (43811), 11731 states have internal predecessors, (43811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 43811 transitions. [2021-06-05 13:46:09,427 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 43811 transitions. Word has length 25 [2021-06-05 13:46:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:09,427 INFO L482 AbstractCegarLoop]: Abstraction has 11732 states and 43811 transitions. [2021-06-05 13:46:09,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 43811 transitions. [2021-06-05 13:46:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:09,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:09,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:09,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:09,645 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:09,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:09,645 INFO L82 PathProgramCache]: Analyzing trace with hash -375648860, now seen corresponding path program 25 times [2021-06-05 13:46:09,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:09,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985362049] [2021-06-05 13:46:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:09,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:09,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985362049] [2021-06-05 13:46:09,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985362049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585760801] [2021-06-05 13:46:09,678 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 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 13:46:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:09,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:09,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:09,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585760801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:09,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:09,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:09,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009988284] [2021-06-05 13:46:09,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:09,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:09,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:09,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:09,818 INFO L87 Difference]: Start difference. First operand 11732 states and 43811 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:10,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:10,228 INFO L93 Difference]: Finished difference Result 14434 states and 52619 transitions. [2021-06-05 13:46:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:46:10,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:10,255 INFO L225 Difference]: With dead ends: 14434 [2021-06-05 13:46:10,256 INFO L226 Difference]: Without dead ends: 14427 [2021-06-05 13:46:10,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:46:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-06-05 13:46:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 11763. [2021-06-05 13:46:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 11762 states have (on average 3.735334126849175) internal successors, (43935), 11762 states have internal predecessors, (43935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 43935 transitions. [2021-06-05 13:46:10,457 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 43935 transitions. Word has length 25 [2021-06-05 13:46:10,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:10,458 INFO L482 AbstractCegarLoop]: Abstraction has 11763 states and 43935 transitions. [2021-06-05 13:46:10,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 43935 transitions. [2021-06-05 13:46:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:10,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:10,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:10,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:10,675 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:10,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:10,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2056092692, now seen corresponding path program 26 times [2021-06-05 13:46:10,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:10,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346473606] [2021-06-05 13:46:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:10,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:10,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346473606] [2021-06-05 13:46:10,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346473606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:10,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084683756] [2021-06-05 13:46:10,720 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 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 13:46:10,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:10,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:10,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:10,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084683756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:10,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:10,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:10,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78541932] [2021-06-05 13:46:10,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:10,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:10,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:10,834 INFO L87 Difference]: Start difference. First operand 11763 states and 43935 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:11,915 INFO L93 Difference]: Finished difference Result 18950 states and 66251 transitions. [2021-06-05 13:46:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:46:11,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:11,949 INFO L225 Difference]: With dead ends: 18950 [2021-06-05 13:46:11,949 INFO L226 Difference]: Without dead ends: 18922 [2021-06-05 13:46:11,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:46:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18922 states. [2021-06-05 13:46:12,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18922 to 11915. [2021-06-05 13:46:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11915 states, 11914 states have (on average 3.732751384925298) internal successors, (44472), 11914 states have internal predecessors, (44472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11915 states to 11915 states and 44472 transitions. [2021-06-05 13:46:12,186 INFO L78 Accepts]: Start accepts. Automaton has 11915 states and 44472 transitions. Word has length 25 [2021-06-05 13:46:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:12,186 INFO L482 AbstractCegarLoop]: Abstraction has 11915 states and 44472 transitions. [2021-06-05 13:46:12,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 11915 states and 44472 transitions. [2021-06-05 13:46:12,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:12,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:12,202 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:12,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 13:46:12,403 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:12,403 INFO L82 PathProgramCache]: Analyzing trace with hash 839007340, now seen corresponding path program 27 times [2021-06-05 13:46:12,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:12,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948402247] [2021-06-05 13:46:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:12,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:12,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948402247] [2021-06-05 13:46:12,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948402247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:12,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493144769] [2021-06-05 13:46:12,434 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 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 13:46:12,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:46:12,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:12,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:12,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493144769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:12,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:12,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:12,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388937592] [2021-06-05 13:46:12,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:12,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:12,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:12,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:12,572 INFO L87 Difference]: Start difference. First operand 11915 states and 44472 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:13,515 INFO L93 Difference]: Finished difference Result 13312 states and 48066 transitions. [2021-06-05 13:46:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:46:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:13,540 INFO L225 Difference]: With dead ends: 13312 [2021-06-05 13:46:13,540 INFO L226 Difference]: Without dead ends: 13300 [2021-06-05 13:46:13,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:46:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13300 states. [2021-06-05 13:46:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13300 to 11985. [2021-06-05 13:46:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 3.7298898531375166) internal successors, (44699), 11984 states have internal predecessors, (44699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 44699 transitions. [2021-06-05 13:46:13,796 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 44699 transitions. Word has length 25 [2021-06-05 13:46:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:13,796 INFO L482 AbstractCegarLoop]: Abstraction has 11985 states and 44699 transitions. [2021-06-05 13:46:13,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 44699 transitions. [2021-06-05 13:46:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:13,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:13,813 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:14,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:14,013 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1160390052, now seen corresponding path program 28 times [2021-06-05 13:46:14,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:14,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656267631] [2021-06-05 13:46:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:14,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656267631] [2021-06-05 13:46:14,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656267631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102435406] [2021-06-05 13:46:14,040 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 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 13:46:14,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:14,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:14,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:14,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:14,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102435406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:14,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:14,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:46:14,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750333565] [2021-06-05 13:46:14,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:46:14,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:14,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:46:14,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:46:14,164 INFO L87 Difference]: Start difference. First operand 11985 states and 44699 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:14,967 INFO L93 Difference]: Finished difference Result 12947 states and 47187 transitions. [2021-06-05 13:46:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:46:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:14,991 INFO L225 Difference]: With dead ends: 12947 [2021-06-05 13:46:14,991 INFO L226 Difference]: Without dead ends: 12926 [2021-06-05 13:46:14,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:46:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12926 states. [2021-06-05 13:46:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12926 to 11863. [2021-06-05 13:46:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11863 states, 11862 states have (on average 3.7376496374978925) internal successors, (44336), 11862 states have internal predecessors, (44336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11863 states to 11863 states and 44336 transitions. [2021-06-05 13:46:15,183 INFO L78 Accepts]: Start accepts. Automaton has 11863 states and 44336 transitions. Word has length 25 [2021-06-05 13:46:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:15,183 INFO L482 AbstractCegarLoop]: Abstraction has 11863 states and 44336 transitions. [2021-06-05 13:46:15,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 11863 states and 44336 transitions. [2021-06-05 13:46:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:15,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:15,200 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:15,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 13:46:15,400 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:15,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1590965864, now seen corresponding path program 29 times [2021-06-05 13:46:15,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:15,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286252174] [2021-06-05 13:46:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:15,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:15,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286252174] [2021-06-05 13:46:15,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286252174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:15,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336389720] [2021-06-05 13:46:15,433 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 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 13:46:15,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:46:15,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:15,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:15,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336389720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:15,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:15,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:15,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439151472] [2021-06-05 13:46:15,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:15,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:15,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:15,565 INFO L87 Difference]: Start difference. First operand 11863 states and 44336 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:16,327 INFO L93 Difference]: Finished difference Result 13151 states and 47733 transitions. [2021-06-05 13:46:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:46:16,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:16,351 INFO L225 Difference]: With dead ends: 13151 [2021-06-05 13:46:16,351 INFO L226 Difference]: Without dead ends: 13088 [2021-06-05 13:46:16,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=494, Invalid=2158, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:46:16,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-06-05 13:46:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 11932. [2021-06-05 13:46:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11932 states, 11931 states have (on average 3.7329645461403067) internal successors, (44538), 11931 states have internal predecessors, (44538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 44538 transitions. [2021-06-05 13:46:16,589 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 44538 transitions. Word has length 25 [2021-06-05 13:46:16,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:16,589 INFO L482 AbstractCegarLoop]: Abstraction has 11932 states and 44538 transitions. [2021-06-05 13:46:16,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 44538 transitions. [2021-06-05 13:46:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:16,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:16,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:16,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 13:46:16,807 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash -855389204, now seen corresponding path program 30 times [2021-06-05 13:46:16,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:16,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376053753] [2021-06-05 13:46:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:16,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:16,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376053753] [2021-06-05 13:46:16,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376053753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:16,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759726154] [2021-06-05 13:46:16,839 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 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 13:46:16,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:46:16,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:16,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:16,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759726154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:16,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:16,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065524836] [2021-06-05 13:46:16,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:16,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:16,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:16,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:16,970 INFO L87 Difference]: Start difference. First operand 11932 states and 44538 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:17,804 INFO L93 Difference]: Finished difference Result 25464 states and 90243 transitions. [2021-06-05 13:46:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:46:17,805 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:17,853 INFO L225 Difference]: With dead ends: 25464 [2021-06-05 13:46:17,853 INFO L226 Difference]: Without dead ends: 25450 [2021-06-05 13:46:17,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 539.4ms TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:46:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25450 states. [2021-06-05 13:46:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25450 to 13949. [2021-06-05 13:46:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13949 states, 13948 states have (on average 3.767923716661887) internal successors, (52555), 13948 states have internal predecessors, (52555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13949 states to 13949 states and 52555 transitions. [2021-06-05 13:46:18,169 INFO L78 Accepts]: Start accepts. Automaton has 13949 states and 52555 transitions. Word has length 25 [2021-06-05 13:46:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:18,169 INFO L482 AbstractCegarLoop]: Abstraction has 13949 states and 52555 transitions. [2021-06-05 13:46:18,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 13949 states and 52555 transitions. [2021-06-05 13:46:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:18,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:18,190 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:18,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 13:46:18,391 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:18,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1931977836, now seen corresponding path program 31 times [2021-06-05 13:46:18,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:18,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654074610] [2021-06-05 13:46:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:18,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654074610] [2021-06-05 13:46:18,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654074610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75094742] [2021-06-05 13:46:18,425 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 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 13:46:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:18,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:18,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75094742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:18,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:18,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:18,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173713799] [2021-06-05 13:46:18,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:18,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:18,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:18,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:18,557 INFO L87 Difference]: Start difference. First operand 13949 states and 52555 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:19,557 INFO L93 Difference]: Finished difference Result 16105 states and 58849 transitions. [2021-06-05 13:46:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 13:46:19,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:19,587 INFO L225 Difference]: With dead ends: 16105 [2021-06-05 13:46:19,588 INFO L226 Difference]: Without dead ends: 16097 [2021-06-05 13:46:19,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 707.1ms TimeCoverageRelationStatistics Valid=747, Invalid=2675, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:46:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16097 states. [2021-06-05 13:46:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16097 to 14207. [2021-06-05 13:46:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14207 states, 14206 states have (on average 3.766718288047304) internal successors, (53510), 14206 states have internal predecessors, (53510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14207 states to 14207 states and 53510 transitions. [2021-06-05 13:46:19,841 INFO L78 Accepts]: Start accepts. Automaton has 14207 states and 53510 transitions. Word has length 25 [2021-06-05 13:46:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:19,841 INFO L482 AbstractCegarLoop]: Abstraction has 14207 states and 53510 transitions. [2021-06-05 13:46:19,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 14207 states and 53510 transitions. [2021-06-05 13:46:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:19,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:19,864 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:20,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 13:46:20,065 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1914731100, now seen corresponding path program 32 times [2021-06-05 13:46:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:20,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200122142] [2021-06-05 13:46:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:20,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:20,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200122142] [2021-06-05 13:46:20,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200122142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:20,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911233351] [2021-06-05 13:46:20,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:46:20,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:20,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:20,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:20,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:20,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911233351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:20,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:20,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:20,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986022546] [2021-06-05 13:46:20,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:20,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:20,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:20,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:20,230 INFO L87 Difference]: Start difference. First operand 14207 states and 53510 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:21,512 INFO L93 Difference]: Finished difference Result 16652 states and 60233 transitions. [2021-06-05 13:46:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:46:21,512 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:21,543 INFO L225 Difference]: With dead ends: 16652 [2021-06-05 13:46:21,543 INFO L226 Difference]: Without dead ends: 16644 [2021-06-05 13:46:21,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 952.5ms TimeCoverageRelationStatistics Valid=1184, Invalid=4668, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 13:46:21,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16644 states. [2021-06-05 13:46:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16644 to 14353. [2021-06-05 13:46:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 14352 states have (on average 3.7623327759197323) internal successors, (53997), 14352 states have internal predecessors, (53997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 53997 transitions. [2021-06-05 13:46:21,862 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 53997 transitions. Word has length 25 [2021-06-05 13:46:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:21,862 INFO L482 AbstractCegarLoop]: Abstraction has 14353 states and 53997 transitions. [2021-06-05 13:46:21,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 53997 transitions. [2021-06-05 13:46:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:21,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:21,884 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:22,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:22,099 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2041606748, now seen corresponding path program 33 times [2021-06-05 13:46:22,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:22,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635369397] [2021-06-05 13:46:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:22,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:22,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635369397] [2021-06-05 13:46:22,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635369397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607384205] [2021-06-05 13:46:22,130 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 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 13:46:22,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:46:22,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:22,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:22,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:22,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607384205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:22,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:22,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:22,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292163054] [2021-06-05 13:46:22,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:22,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:22,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:22,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:22,264 INFO L87 Difference]: Start difference. First operand 14353 states and 53997 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:23,256 INFO L93 Difference]: Finished difference Result 16318 states and 59373 transitions. [2021-06-05 13:46:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:46:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:23,293 INFO L225 Difference]: With dead ends: 16318 [2021-06-05 13:46:23,293 INFO L226 Difference]: Without dead ends: 16297 [2021-06-05 13:46:23,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 655.8ms TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 13:46:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16297 states. [2021-06-05 13:46:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16297 to 14217. [2021-06-05 13:46:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14217 states, 14216 states have (on average 3.7649831176139563) internal successors, (53523), 14216 states have internal predecessors, (53523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14217 states to 14217 states and 53523 transitions. [2021-06-05 13:46:23,569 INFO L78 Accepts]: Start accepts. Automaton has 14217 states and 53523 transitions. Word has length 25 [2021-06-05 13:46:23,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:23,569 INFO L482 AbstractCegarLoop]: Abstraction has 14217 states and 53523 transitions. [2021-06-05 13:46:23,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 14217 states and 53523 transitions. [2021-06-05 13:46:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:23,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:23,592 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:23,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:23,792 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 873025256, now seen corresponding path program 34 times [2021-06-05 13:46:23,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:23,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226072451] [2021-06-05 13:46:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:23,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:23,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226072451] [2021-06-05 13:46:23,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226072451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:23,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568914888] [2021-06-05 13:46:23,825 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 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 13:46:23,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:23,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:23,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:23,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568914888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:23,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:23,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:23,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970614663] [2021-06-05 13:46:23,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:23,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:23,965 INFO L87 Difference]: Start difference. First operand 14217 states and 53523 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:25,209 INFO L93 Difference]: Finished difference Result 17791 states and 64217 transitions. [2021-06-05 13:46:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:46:25,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:25,246 INFO L225 Difference]: With dead ends: 17791 [2021-06-05 13:46:25,247 INFO L226 Difference]: Without dead ends: 17783 [2021-06-05 13:46:25,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 762.1ms TimeCoverageRelationStatistics Valid=854, Invalid=2928, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 13:46:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17783 states. [2021-06-05 13:46:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17783 to 14184. [2021-06-05 13:46:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14183 states have (on average 3.768455192836494) internal successors, (53448), 14183 states have internal predecessors, (53448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 53448 transitions. [2021-06-05 13:46:25,541 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 53448 transitions. Word has length 25 [2021-06-05 13:46:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:25,541 INFO L482 AbstractCegarLoop]: Abstraction has 14184 states and 53448 transitions. [2021-06-05 13:46:25,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 53448 transitions. [2021-06-05 13:46:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:25,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:25,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:25,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 13:46:25,765 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1319636132, now seen corresponding path program 35 times [2021-06-05 13:46:25,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:25,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459451324] [2021-06-05 13:46:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:25,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:25,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459451324] [2021-06-05 13:46:25,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459451324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107751987] [2021-06-05 13:46:25,793 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 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 13:46:25,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:46:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:25,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107751987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:25,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:25,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:25,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761080556] [2021-06-05 13:46:25,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:25,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:25,917 INFO L87 Difference]: Start difference. First operand 14184 states and 53448 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:26,652 INFO L93 Difference]: Finished difference Result 22000 states and 79243 transitions. [2021-06-05 13:46:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:46:26,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:26,698 INFO L225 Difference]: With dead ends: 22000 [2021-06-05 13:46:26,698 INFO L226 Difference]: Without dead ends: 21980 [2021-06-05 13:46:26,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:46:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21980 states. [2021-06-05 13:46:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21980 to 14177. [2021-06-05 13:46:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-06-05 13:46:27,005 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-06-05 13:46:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:27,005 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-06-05 13:46:27,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-06-05 13:46:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:27,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:27,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:27,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 13:46:27,228 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash 184920788, now seen corresponding path program 36 times [2021-06-05 13:46:27,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:27,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324249758] [2021-06-05 13:46:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:27,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:27,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324249758] [2021-06-05 13:46:27,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324249758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:27,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659488912] [2021-06-05 13:46:27,419 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 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 13:46:27,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:46:27,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:27,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:27,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659488912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:27,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:27,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:27,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105928869] [2021-06-05 13:46:27,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:27,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:27,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:27,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:27,558 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:28,228 INFO L93 Difference]: Finished difference Result 16102 states and 58957 transitions. [2021-06-05 13:46:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:46:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:28,260 INFO L225 Difference]: With dead ends: 16102 [2021-06-05 13:46:28,261 INFO L226 Difference]: Without dead ends: 16063 [2021-06-05 13:46:28,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 641.0ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:46:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16063 states. [2021-06-05 13:46:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16063 to 14177. [2021-06-05 13:46:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-06-05 13:46:28,548 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-06-05 13:46:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:28,548 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-06-05 13:46:28,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-06-05 13:46:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:28,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:28,571 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:28,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 13:46:28,785 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:28,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1590938324, now seen corresponding path program 37 times [2021-06-05 13:46:28,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:28,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925586418] [2021-06-05 13:46:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:28,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925586418] [2021-06-05 13:46:28,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925586418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653456211] [2021-06-05 13:46:28,925 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 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 13:46:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:28,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:28,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:29,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653456211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:29,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:29,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:29,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620073755] [2021-06-05 13:46:29,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:29,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:29,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:29,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:29,053 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:29,668 INFO L93 Difference]: Finished difference Result 16364 states and 59643 transitions. [2021-06-05 13:46:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:46:29,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:29,699 INFO L225 Difference]: With dead ends: 16364 [2021-06-05 13:46:29,699 INFO L226 Difference]: Without dead ends: 16325 [2021-06-05 13:46:29,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 521.4ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:46:29,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-06-05 13:46:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 14230. [2021-06-05 13:46:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14230 states, 14229 states have (on average 3.7625975121231288) internal successors, (53538), 14229 states have internal predecessors, (53538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14230 states to 14230 states and 53538 transitions. [2021-06-05 13:46:29,960 INFO L78 Accepts]: Start accepts. Automaton has 14230 states and 53538 transitions. Word has length 25 [2021-06-05 13:46:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:29,960 INFO L482 AbstractCegarLoop]: Abstraction has 14230 states and 53538 transitions. [2021-06-05 13:46:29,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 14230 states and 53538 transitions. [2021-06-05 13:46:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:29,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:29,981 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:30,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:30,181 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash -737296944, now seen corresponding path program 38 times [2021-06-05 13:46:30,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:30,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629881792] [2021-06-05 13:46:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:30,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:30,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629881792] [2021-06-05 13:46:30,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629881792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:30,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736413801] [2021-06-05 13:46:30,213 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 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 13:46:30,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:30,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:30,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736413801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:30,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:30,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:30,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239167847] [2021-06-05 13:46:30,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:30,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:30,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:30,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:30,342 INFO L87 Difference]: Start difference. First operand 14230 states and 53538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:31,129 INFO L93 Difference]: Finished difference Result 17402 states and 62642 transitions. [2021-06-05 13:46:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:46:31,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:31,160 INFO L225 Difference]: With dead ends: 17402 [2021-06-05 13:46:31,160 INFO L226 Difference]: Without dead ends: 17346 [2021-06-05 13:46:31,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=588, Invalid=1962, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:46:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17346 states. [2021-06-05 13:46:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17346 to 14300. [2021-06-05 13:46:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14300 states, 14299 states have (on average 3.7624309392265194) internal successors, (53799), 14299 states have internal predecessors, (53799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14300 states to 14300 states and 53799 transitions. [2021-06-05 13:46:31,487 INFO L78 Accepts]: Start accepts. Automaton has 14300 states and 53799 transitions. Word has length 25 [2021-06-05 13:46:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:31,487 INFO L482 AbstractCegarLoop]: Abstraction has 14300 states and 53799 transitions. [2021-06-05 13:46:31,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 14300 states and 53799 transitions. [2021-06-05 13:46:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:31,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:31,510 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:31,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:31,710 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:31,710 INFO L82 PathProgramCache]: Analyzing trace with hash 455169488, now seen corresponding path program 39 times [2021-06-05 13:46:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:31,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980141613] [2021-06-05 13:46:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:31,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:31,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980141613] [2021-06-05 13:46:31,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980141613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:31,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562713809] [2021-06-05 13:46:31,742 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 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 13:46:31,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:46:31,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:31,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:31,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:31,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562713809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:31,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:31,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:31,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684185289] [2021-06-05 13:46:31,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:31,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:31,869 INFO L87 Difference]: Start difference. First operand 14300 states and 53799 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:32,928 INFO L93 Difference]: Finished difference Result 17837 states and 63858 transitions. [2021-06-05 13:46:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:46:32,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:32,961 INFO L225 Difference]: With dead ends: 17837 [2021-06-05 13:46:32,961 INFO L226 Difference]: Without dead ends: 17809 [2021-06-05 13:46:32,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 772.3ms TimeCoverageRelationStatistics Valid=831, Invalid=2591, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:46:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17809 states. [2021-06-05 13:46:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17809 to 14629. [2021-06-05 13:46:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14629 states, 14628 states have (on average 3.7605961170358215) internal successors, (55010), 14628 states have internal predecessors, (55010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14629 states to 14629 states and 55010 transitions. [2021-06-05 13:46:33,261 INFO L78 Accepts]: Start accepts. Automaton has 14629 states and 55010 transitions. Word has length 25 [2021-06-05 13:46:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:33,261 INFO L482 AbstractCegarLoop]: Abstraction has 14629 states and 55010 transitions. [2021-06-05 13:46:33,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 14629 states and 55010 transitions. [2021-06-05 13:46:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:33,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:33,283 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:33,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 13:46:33,484 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1559764180, now seen corresponding path program 40 times [2021-06-05 13:46:33,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:33,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159815542] [2021-06-05 13:46:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:33,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:33,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159815542] [2021-06-05 13:46:33,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159815542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691030697] [2021-06-05 13:46:33,515 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 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 13:46:33,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:33,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:46:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:33,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691030697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:33,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:33,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:46:33,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904340210] [2021-06-05 13:46:33,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:46:33,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:33,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:46:33,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:46:33,642 INFO L87 Difference]: Start difference. First operand 14629 states and 55010 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:34,948 INFO L93 Difference]: Finished difference Result 18031 states and 64399 transitions. [2021-06-05 13:46:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 13:46:34,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:34,981 INFO L225 Difference]: With dead ends: 18031 [2021-06-05 13:46:34,981 INFO L226 Difference]: Without dead ends: 18031 [2021-06-05 13:46:34,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 980.5ms TimeCoverageRelationStatistics Valid=1162, Invalid=3394, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:46:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18031 states. [2021-06-05 13:46:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18031 to 14473. [2021-06-05 13:46:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14473 states, 14472 states have (on average 3.7587064676616917) internal successors, (54396), 14472 states have internal predecessors, (54396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14473 states to 14473 states and 54396 transitions. [2021-06-05 13:46:35,276 INFO L78 Accepts]: Start accepts. Automaton has 14473 states and 54396 transitions. Word has length 25 [2021-06-05 13:46:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:35,276 INFO L482 AbstractCegarLoop]: Abstraction has 14473 states and 54396 transitions. [2021-06-05 13:46:35,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 14473 states and 54396 transitions. [2021-06-05 13:46:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:35,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:35,298 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:35,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 13:46:35,499 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:35,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1896120598, now seen corresponding path program 41 times [2021-06-05 13:46:35,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:35,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911887342] [2021-06-05 13:46:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:35,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:35,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911887342] [2021-06-05 13:46:35,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911887342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211358439] [2021-06-05 13:46:35,534 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 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 13:46:35,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:46:35,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:35,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:35,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211358439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:35,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:35,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:35,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794848722] [2021-06-05 13:46:35,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:35,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:35,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:35,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:35,652 INFO L87 Difference]: Start difference. First operand 14473 states and 54396 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:37,568 INFO L93 Difference]: Finished difference Result 35647 states and 127415 transitions. [2021-06-05 13:46:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 13:46:37,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:37,654 INFO L225 Difference]: With dead ends: 35647 [2021-06-05 13:46:37,655 INFO L226 Difference]: Without dead ends: 35617 [2021-06-05 13:46:37,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 1252.2ms TimeCoverageRelationStatistics Valid=1753, Invalid=6257, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 13:46:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35617 states. [2021-06-05 13:46:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35617 to 18774. [2021-06-05 13:46:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18774 states, 18773 states have (on average 3.835082299046503) internal successors, (71996), 18773 states have internal predecessors, (71996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18774 states to 18774 states and 71996 transitions. [2021-06-05 13:46:38,220 INFO L78 Accepts]: Start accepts. Automaton has 18774 states and 71996 transitions. Word has length 25 [2021-06-05 13:46:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:38,220 INFO L482 AbstractCegarLoop]: Abstraction has 18774 states and 71996 transitions. [2021-06-05 13:46:38,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 18774 states and 71996 transitions. [2021-06-05 13:46:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:38,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:38,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:38,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:38,451 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:38,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1420289254, now seen corresponding path program 42 times [2021-06-05 13:46:38,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:38,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648844006] [2021-06-05 13:46:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:38,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:38,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648844006] [2021-06-05 13:46:38,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648844006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:38,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155099509] [2021-06-05 13:46:38,487 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 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 13:46:38,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:46:38,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:38,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155099509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:38,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:38,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:38,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227105819] [2021-06-05 13:46:38,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:38,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:38,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:38,598 INFO L87 Difference]: Start difference. First operand 18774 states and 71996 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:40,425 INFO L93 Difference]: Finished difference Result 41975 states and 148341 transitions. [2021-06-05 13:46:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 13:46:40,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:40,531 INFO L225 Difference]: With dead ends: 41975 [2021-06-05 13:46:40,531 INFO L226 Difference]: Without dead ends: 41947 [2021-06-05 13:46:40,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1185.3ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 13:46:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41947 states. [2021-06-05 13:46:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41947 to 17457. [2021-06-05 13:46:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17457 states, 17456 states have (on average 3.817942254812099) internal successors, (66646), 17456 states have internal predecessors, (66646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17457 states to 17457 states and 66646 transitions. [2021-06-05 13:46:41,141 INFO L78 Accepts]: Start accepts. Automaton has 17457 states and 66646 transitions. Word has length 25 [2021-06-05 13:46:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:41,141 INFO L482 AbstractCegarLoop]: Abstraction has 17457 states and 66646 transitions. [2021-06-05 13:46:41,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17457 states and 66646 transitions. [2021-06-05 13:46:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:41,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:41,168 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:41,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 13:46:41,368 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash 463223062, now seen corresponding path program 43 times [2021-06-05 13:46:41,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:41,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121426199] [2021-06-05 13:46:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:41,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:41,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121426199] [2021-06-05 13:46:41,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121426199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:41,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483606115] [2021-06-05 13:46:41,398 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 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 13:46:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:41,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483606115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:41,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:41,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:41,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261897544] [2021-06-05 13:46:41,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:41,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:41,507 INFO L87 Difference]: Start difference. First operand 17457 states and 66646 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:43,211 INFO L93 Difference]: Finished difference Result 36580 states and 131067 transitions. [2021-06-05 13:46:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 13:46:43,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:43,290 INFO L225 Difference]: With dead ends: 36580 [2021-06-05 13:46:43,290 INFO L226 Difference]: Without dead ends: 36556 [2021-06-05 13:46:43,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 1080.0ms TimeCoverageRelationStatistics Valid=1644, Invalid=5666, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 13:46:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36556 states. [2021-06-05 13:46:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36556 to 18518. [2021-06-05 13:46:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18518 states, 18517 states have (on average 3.856510233839175) internal successors, (71411), 18517 states have internal predecessors, (71411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18518 states to 18518 states and 71411 transitions. [2021-06-05 13:46:43,873 INFO L78 Accepts]: Start accepts. Automaton has 18518 states and 71411 transitions. Word has length 25 [2021-06-05 13:46:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:43,873 INFO L482 AbstractCegarLoop]: Abstraction has 18518 states and 71411 transitions. [2021-06-05 13:46:43,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 18518 states and 71411 transitions. [2021-06-05 13:46:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:43,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:43,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:44,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:44,102 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:44,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1441780506, now seen corresponding path program 44 times [2021-06-05 13:46:44,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:44,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822000210] [2021-06-05 13:46:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:44,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:44,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822000210] [2021-06-05 13:46:44,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822000210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:44,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926695512] [2021-06-05 13:46:44,130 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 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 13:46:44,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:44,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:44,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926695512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:44,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:44,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:44,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347172796] [2021-06-05 13:46:44,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:44,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:44,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:44,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:44,237 INFO L87 Difference]: Start difference. First operand 18518 states and 71411 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:45,759 INFO L93 Difference]: Finished difference Result 41528 states and 148376 transitions. [2021-06-05 13:46:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 13:46:45,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:45,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:45,842 INFO L225 Difference]: With dead ends: 41528 [2021-06-05 13:46:45,842 INFO L226 Difference]: Without dead ends: 41528 [2021-06-05 13:46:45,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 936.7ms TimeCoverageRelationStatistics Valid=1246, Invalid=3584, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:46:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41528 states. [2021-06-05 13:46:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41528 to 18785. [2021-06-05 13:46:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18785 states, 18784 states have (on average 3.8521081771720613) internal successors, (72358), 18784 states have internal predecessors, (72358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18785 states to 18785 states and 72358 transitions. [2021-06-05 13:46:46,529 INFO L78 Accepts]: Start accepts. Automaton has 18785 states and 72358 transitions. Word has length 25 [2021-06-05 13:46:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:46,530 INFO L482 AbstractCegarLoop]: Abstraction has 18785 states and 72358 transitions. [2021-06-05 13:46:46,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 18785 states and 72358 transitions. [2021-06-05 13:46:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:46,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:46,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:46,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 13:46:46,769 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:46,769 INFO L82 PathProgramCache]: Analyzing trace with hash -830468258, now seen corresponding path program 45 times [2021-06-05 13:46:46,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:46,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661650462] [2021-06-05 13:46:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:46,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:46,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661650462] [2021-06-05 13:46:46,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661650462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236509275] [2021-06-05 13:46:46,799 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 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 13:46:46,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:46:46,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:46,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:46,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:46,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236509275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:46,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:46,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:46,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277693078] [2021-06-05 13:46:46,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:46,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:46,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:46,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:46,928 INFO L87 Difference]: Start difference. First operand 18785 states and 72358 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:48,363 INFO L93 Difference]: Finished difference Result 27513 states and 99519 transitions. [2021-06-05 13:46:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 13:46:48,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:48,425 INFO L225 Difference]: With dead ends: 27513 [2021-06-05 13:46:48,426 INFO L226 Difference]: Without dead ends: 27489 [2021-06-05 13:46:48,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 923.5ms TimeCoverageRelationStatistics Valid=1260, Invalid=4746, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 13:46:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27489 states. [2021-06-05 13:46:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27489 to 18811. [2021-06-05 13:46:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18811 states, 18810 states have (on average 3.8517278043593834) internal successors, (72451), 18810 states have internal predecessors, (72451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18811 states to 18811 states and 72451 transitions. [2021-06-05 13:46:48,861 INFO L78 Accepts]: Start accepts. Automaton has 18811 states and 72451 transitions. Word has length 25 [2021-06-05 13:46:48,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:48,861 INFO L482 AbstractCegarLoop]: Abstraction has 18811 states and 72451 transitions. [2021-06-05 13:46:48,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:48,861 INFO L276 IsEmpty]: Start isEmpty. Operand 18811 states and 72451 transitions. [2021-06-05 13:46:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:48,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:48,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:49,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:49,110 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:49,110 INFO L82 PathProgramCache]: Analyzing trace with hash 470709726, now seen corresponding path program 46 times [2021-06-05 13:46:49,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:49,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232954472] [2021-06-05 13:46:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:49,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:49,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232954472] [2021-06-05 13:46:49,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232954472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371332855] [2021-06-05 13:46:49,139 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 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 13:46:49,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:46:49,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:49,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:49,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371332855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:49,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:49,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:49,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104411821] [2021-06-05 13:46:49,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:49,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:49,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:49,265 INFO L87 Difference]: Start difference. First operand 18811 states and 72451 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 13:46:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:50,482 INFO L93 Difference]: Finished difference Result 26218 states and 95948 transitions. [2021-06-05 13:46:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 13:46:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 25 [2021-06-05 13:46:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:50,533 INFO L225 Difference]: With dead ends: 26218 [2021-06-05 13:46:50,533 INFO L226 Difference]: Without dead ends: 26184 [2021-06-05 13:46:50,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 805.7ms TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 13:46:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2021-06-05 13:46:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 18809. [2021-06-05 13:46:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18809 states, 18808 states have (on average 3.8517120374308806) internal successors, (72443), 18808 states have internal predecessors, (72443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18809 states to 18809 states and 72443 transitions. [2021-06-05 13:46:50,915 INFO L78 Accepts]: Start accepts. Automaton has 18809 states and 72443 transitions. Word has length 25 [2021-06-05 13:46:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:50,915 INFO L482 AbstractCegarLoop]: Abstraction has 18809 states and 72443 transitions. [2021-06-05 13:46:50,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 13:46:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 18809 states and 72443 transitions. [2021-06-05 13:46:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:50,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:50,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:51,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 13:46:51,145 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash 472331746, now seen corresponding path program 47 times [2021-06-05 13:46:51,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:51,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291755089] [2021-06-05 13:46:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:51,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:51,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291755089] [2021-06-05 13:46:51,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291755089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:51,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532861214] [2021-06-05 13:46:51,172 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 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 13:46:51,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:46:51,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:51,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532861214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:51,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:51,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:51,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433508858] [2021-06-05 13:46:51,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:51,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:51,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:51,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:51,295 INFO L87 Difference]: Start difference. First operand 18809 states and 72443 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:52,849 INFO L93 Difference]: Finished difference Result 44899 states and 160666 transitions. [2021-06-05 13:46:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:46:52,849 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:52,949 INFO L225 Difference]: With dead ends: 44899 [2021-06-05 13:46:52,949 INFO L226 Difference]: Without dead ends: 44892 [2021-06-05 13:46:52,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1034.9ms TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 13:46:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44892 states. [2021-06-05 13:46:53,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44892 to 19185. [2021-06-05 13:46:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19185 states, 19184 states have (on average 3.875260633861551) internal successors, (74343), 19184 states have internal predecessors, (74343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19185 states to 19185 states and 74343 transitions. [2021-06-05 13:46:53,715 INFO L78 Accepts]: Start accepts. Automaton has 19185 states and 74343 transitions. Word has length 25 [2021-06-05 13:46:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:53,715 INFO L482 AbstractCegarLoop]: Abstraction has 19185 states and 74343 transitions. [2021-06-05 13:46:53,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 19185 states and 74343 transitions. [2021-06-05 13:46:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:53,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:53,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:53,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:53,944 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1647610214, now seen corresponding path program 48 times [2021-06-05 13:46:53,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:53,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935650365] [2021-06-05 13:46:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:53,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:53,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935650365] [2021-06-05 13:46:53,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935650365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:53,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129579440] [2021-06-05 13:46:53,975 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:53,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:46:53,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:54,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:54,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129579440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:54,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:54,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:54,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487883232] [2021-06-05 13:46:54,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:54,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:54,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:54,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:54,087 INFO L87 Difference]: Start difference. First operand 19185 states and 74343 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:55,484 INFO L93 Difference]: Finished difference Result 37958 states and 137798 transitions. [2021-06-05 13:46:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 13:46:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:55,574 INFO L225 Difference]: With dead ends: 37958 [2021-06-05 13:46:55,574 INFO L226 Difference]: Without dead ends: 37918 [2021-06-05 13:46:55,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 848.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3604, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:46:55,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37918 states. [2021-06-05 13:46:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37918 to 19182. [2021-06-05 13:46:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19182 states, 19181 states have (on average 3.8743548303008186) internal successors, (74314), 19181 states have internal predecessors, (74314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19182 states to 19182 states and 74314 transitions. [2021-06-05 13:46:56,144 INFO L78 Accepts]: Start accepts. Automaton has 19182 states and 74314 transitions. Word has length 25 [2021-06-05 13:46:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:56,144 INFO L482 AbstractCegarLoop]: Abstraction has 19182 states and 74314 transitions. [2021-06-05 13:46:56,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 19182 states and 74314 transitions. [2021-06-05 13:46:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:56,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:56,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:56,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:56,376 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1462510574, now seen corresponding path program 49 times [2021-06-05 13:46:56,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:56,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668686473] [2021-06-05 13:46:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:56,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:56,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668686473] [2021-06-05 13:46:56,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668686473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:56,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710642606] [2021-06-05 13:46:56,440 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:46:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:56,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:56,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710642606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:56,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:56,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:56,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105739076] [2021-06-05 13:46:56,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:56,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:56,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:56,602 INFO L87 Difference]: Start difference. First operand 19182 states and 74314 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:46:58,605 INFO L93 Difference]: Finished difference Result 43788 states and 155142 transitions. [2021-06-05 13:46:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 13:46:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:46:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:46:58,709 INFO L225 Difference]: With dead ends: 43788 [2021-06-05 13:46:58,709 INFO L226 Difference]: Without dead ends: 43753 [2021-06-05 13:46:58,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1280.0ms TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 13:46:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43753 states. [2021-06-05 13:46:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43753 to 22487. [2021-06-05 13:46:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22487 states, 22486 states have (on average 3.8633816596993684) internal successors, (86872), 22486 states have internal predecessors, (86872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22487 states to 22487 states and 86872 transitions. [2021-06-05 13:46:59,311 INFO L78 Accepts]: Start accepts. Automaton has 22487 states and 86872 transitions. Word has length 25 [2021-06-05 13:46:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:46:59,311 INFO L482 AbstractCegarLoop]: Abstraction has 22487 states and 86872 transitions. [2021-06-05 13:46:59,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:46:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 22487 states and 86872 transitions. [2021-06-05 13:46:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:46:59,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:46:59,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:46:59,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:46:59,547 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:46:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:46:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1491412058, now seen corresponding path program 50 times [2021-06-05 13:46:59,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:46:59,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528927006] [2021-06-05 13:46:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:46:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:46:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:59,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:46:59,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528927006] [2021-06-05 13:46:59,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528927006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:59,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324804655] [2021-06-05 13:46:59,577 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 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 13:46:59,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:46:59,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:46:59,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:46:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:46:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:46:59,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324804655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:46:59,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:46:59,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:46:59,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546868342] [2021-06-05 13:46:59,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:46:59,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:46:59,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:46:59,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:46:59,689 INFO L87 Difference]: Start difference. First operand 22487 states and 86872 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:00,680 INFO L93 Difference]: Finished difference Result 34933 states and 127285 transitions. [2021-06-05 13:47:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:47:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:00,755 INFO L225 Difference]: With dead ends: 34933 [2021-06-05 13:47:00,755 INFO L226 Difference]: Without dead ends: 34912 [2021-06-05 13:47:00,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 646.6ms TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:47:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34912 states. [2021-06-05 13:47:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34912 to 22735. [2021-06-05 13:47:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22735 states, 22734 states have (on average 3.8544910706430895) internal successors, (87628), 22734 states have internal predecessors, (87628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22735 states to 22735 states and 87628 transitions. [2021-06-05 13:47:01,326 INFO L78 Accepts]: Start accepts. Automaton has 22735 states and 87628 transitions. Word has length 25 [2021-06-05 13:47:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:01,326 INFO L482 AbstractCegarLoop]: Abstraction has 22735 states and 87628 transitions. [2021-06-05 13:47:01,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 22735 states and 87628 transitions. [2021-06-05 13:47:01,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:01,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:01,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:01,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 13:47:01,560 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:01,560 INFO L82 PathProgramCache]: Analyzing trace with hash -340397470, now seen corresponding path program 51 times [2021-06-05 13:47:01,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:01,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016414139] [2021-06-05 13:47:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:01,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:01,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016414139] [2021-06-05 13:47:01,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016414139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:01,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138082011] [2021-06-05 13:47:01,590 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 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 13:47:01,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:47:01,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:47:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:01,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138082011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:01,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:01,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:47:01,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070149576] [2021-06-05 13:47:01,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:47:01,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:01,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:47:01,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:47:01,705 INFO L87 Difference]: Start difference. First operand 22735 states and 87628 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:02,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:02,439 INFO L93 Difference]: Finished difference Result 39052 states and 142123 transitions. [2021-06-05 13:47:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:47:02,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:02,523 INFO L225 Difference]: With dead ends: 39052 [2021-06-05 13:47:02,523 INFO L226 Difference]: Without dead ends: 39052 [2021-06-05 13:47:02,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:47:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-06-05 13:47:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 23152. [2021-06-05 13:47:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23152 states, 23151 states have (on average 3.8622089758541747) internal successors, (89414), 23151 states have internal predecessors, (89414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23152 states to 23152 states and 89414 transitions. [2021-06-05 13:47:03,073 INFO L78 Accepts]: Start accepts. Automaton has 23152 states and 89414 transitions. Word has length 25 [2021-06-05 13:47:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:03,073 INFO L482 AbstractCegarLoop]: Abstraction has 23152 states and 89414 transitions. [2021-06-05 13:47:03,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 23152 states and 89414 transitions. [2021-06-05 13:47:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:03,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:03,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:03,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:03,309 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2136719838, now seen corresponding path program 52 times [2021-06-05 13:47:03,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:03,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106012544] [2021-06-05 13:47:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:03,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:03,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106012544] [2021-06-05 13:47:03,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106012544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:03,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481991721] [2021-06-05 13:47:03,343 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 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 13:47:03,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:03,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:03,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:03,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481991721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:03,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:03,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:03,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704721411] [2021-06-05 13:47:03,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:03,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:03,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:03,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:03,477 INFO L87 Difference]: Start difference. First operand 23152 states and 89414 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:05,090 INFO L93 Difference]: Finished difference Result 36484 states and 134220 transitions. [2021-06-05 13:47:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 13:47:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:05,183 INFO L225 Difference]: With dead ends: 36484 [2021-06-05 13:47:05,183 INFO L226 Difference]: Without dead ends: 36484 [2021-06-05 13:47:05,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1025.1ms TimeCoverageRelationStatistics Valid=1100, Invalid=4302, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 13:47:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36484 states. [2021-06-05 13:47:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36484 to 23276. [2021-06-05 13:47:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23276 states, 23275 states have (on average 3.866122448979592) internal successors, (89984), 23275 states have internal predecessors, (89984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23276 states to 23276 states and 89984 transitions. [2021-06-05 13:47:05,788 INFO L78 Accepts]: Start accepts. Automaton has 23276 states and 89984 transitions. Word has length 25 [2021-06-05 13:47:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:05,788 INFO L482 AbstractCegarLoop]: Abstraction has 23276 states and 89984 transitions. [2021-06-05 13:47:05,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 23276 states and 89984 transitions. [2021-06-05 13:47:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:05,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:05,826 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:06,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 13:47:06,027 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:06,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1764860382, now seen corresponding path program 53 times [2021-06-05 13:47:06,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:06,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696417661] [2021-06-05 13:47:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:06,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:06,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696417661] [2021-06-05 13:47:06,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696417661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:06,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551115] [2021-06-05 13:47:06,060 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 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 13:47:06,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:47:06,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:06,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:06,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:06,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:06,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:06,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471334202] [2021-06-05 13:47:06,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:06,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:06,207 INFO L87 Difference]: Start difference. First operand 23276 states and 89984 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:07,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:07,719 INFO L93 Difference]: Finished difference Result 36924 states and 135962 transitions. [2021-06-05 13:47:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:47:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:07,800 INFO L225 Difference]: With dead ends: 36924 [2021-06-05 13:47:07,800 INFO L226 Difference]: Without dead ends: 36924 [2021-06-05 13:47:07,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 981.5ms TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 13:47:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36924 states. [2021-06-05 13:47:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36924 to 23342. [2021-06-05 13:47:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23342 states, 23341 states have (on average 3.8635876783342615) internal successors, (90180), 23341 states have internal predecessors, (90180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23342 states to 23342 states and 90180 transitions. [2021-06-05 13:47:08,476 INFO L78 Accepts]: Start accepts. Automaton has 23342 states and 90180 transitions. Word has length 25 [2021-06-05 13:47:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:08,476 INFO L482 AbstractCegarLoop]: Abstraction has 23342 states and 90180 transitions. [2021-06-05 13:47:08,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 23342 states and 90180 transitions. [2021-06-05 13:47:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:08,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:08,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:08,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 13:47:08,712 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:08,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1834627866, now seen corresponding path program 54 times [2021-06-05 13:47:08,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:08,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027012922] [2021-06-05 13:47:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:08,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027012922] [2021-06-05 13:47:08,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027012922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937250304] [2021-06-05 13:47:08,744 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 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 13:47:08,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:08,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:47:08,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:08,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937250304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:08,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:08,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:47:08,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596519340] [2021-06-05 13:47:08,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:47:08,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:47:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:47:08,855 INFO L87 Difference]: Start difference. First operand 23342 states and 90180 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:09,596 INFO L93 Difference]: Finished difference Result 36712 states and 134265 transitions. [2021-06-05 13:47:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 13:47:09,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:09,677 INFO L225 Difference]: With dead ends: 36712 [2021-06-05 13:47:09,678 INFO L226 Difference]: Without dead ends: 36694 [2021-06-05 13:47:09,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=366, Invalid=1356, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:47:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2021-06-05 13:47:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 23302. [2021-06-05 13:47:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23302 states, 23301 states have (on average 3.860478091069053) internal successors, (89953), 23301 states have internal predecessors, (89953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23302 states to 23302 states and 89953 transitions. [2021-06-05 13:47:10,228 INFO L78 Accepts]: Start accepts. Automaton has 23302 states and 89953 transitions. Word has length 25 [2021-06-05 13:47:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:10,228 INFO L482 AbstractCegarLoop]: Abstraction has 23302 states and 89953 transitions. [2021-06-05 13:47:10,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 23302 states and 89953 transitions. [2021-06-05 13:47:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:10,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:10,262 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:10,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:10,465 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2007733018, now seen corresponding path program 55 times [2021-06-05 13:47:10,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:10,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737132825] [2021-06-05 13:47:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:10,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:10,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737132825] [2021-06-05 13:47:10,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737132825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:10,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96944601] [2021-06-05 13:47:10,497 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 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 13:47:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:10,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:10,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96944601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:10,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:10,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:10,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185727845] [2021-06-05 13:47:10,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:10,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:10,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:10,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:10,624 INFO L87 Difference]: Start difference. First operand 23302 states and 89953 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:12,169 INFO L93 Difference]: Finished difference Result 30537 states and 112209 transitions. [2021-06-05 13:47:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 13:47:12,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:12,235 INFO L225 Difference]: With dead ends: 30537 [2021-06-05 13:47:12,236 INFO L226 Difference]: Without dead ends: 30533 [2021-06-05 13:47:12,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1043.4ms TimeCoverageRelationStatistics Valid=1261, Invalid=4439, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 13:47:12,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30533 states. [2021-06-05 13:47:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30533 to 23633. [2021-06-05 13:47:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23633 states, 23632 states have (on average 3.8681872037914693) internal successors, (91413), 23632 states have internal predecessors, (91413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23633 states to 23633 states and 91413 transitions. [2021-06-05 13:47:12,826 INFO L78 Accepts]: Start accepts. Automaton has 23633 states and 91413 transitions. Word has length 25 [2021-06-05 13:47:12,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:12,826 INFO L482 AbstractCegarLoop]: Abstraction has 23633 states and 91413 transitions. [2021-06-05 13:47:12,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 23633 states and 91413 transitions. [2021-06-05 13:47:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:12,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:12,863 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:13,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:13,065 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:13,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1250552554, now seen corresponding path program 56 times [2021-06-05 13:47:13,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:13,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185916729] [2021-06-05 13:47:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:13,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:13,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185916729] [2021-06-05 13:47:13,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185916729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:13,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353219017] [2021-06-05 13:47:13,099 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 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 13:47:13,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:13,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:13,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353219017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:13,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:13,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:13,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482647796] [2021-06-05 13:47:13,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:13,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:13,233 INFO L87 Difference]: Start difference. First operand 23633 states and 91413 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:14,723 INFO L93 Difference]: Finished difference Result 30537 states and 112384 transitions. [2021-06-05 13:47:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:47:14,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:14,789 INFO L225 Difference]: With dead ends: 30537 [2021-06-05 13:47:14,789 INFO L226 Difference]: Without dead ends: 30531 [2021-06-05 13:47:14,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 985.4ms TimeCoverageRelationStatistics Valid=1160, Invalid=4096, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 13:47:14,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30531 states. [2021-06-05 13:47:15,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30531 to 23624. [2021-06-05 13:47:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23624 states, 23623 states have (on average 3.866274393599458) internal successors, (91333), 23623 states have internal predecessors, (91333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23624 states to 23624 states and 91333 transitions. [2021-06-05 13:47:15,300 INFO L78 Accepts]: Start accepts. Automaton has 23624 states and 91333 transitions. Word has length 25 [2021-06-05 13:47:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:15,300 INFO L482 AbstractCegarLoop]: Abstraction has 23624 states and 91333 transitions. [2021-06-05 13:47:15,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 23624 states and 91333 transitions. [2021-06-05 13:47:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:15,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:15,338 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:15,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 13:47:15,538 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:15,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1799330538, now seen corresponding path program 57 times [2021-06-05 13:47:15,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:15,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482696350] [2021-06-05 13:47:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:15,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:15,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482696350] [2021-06-05 13:47:15,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482696350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:15,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251804973] [2021-06-05 13:47:15,571 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 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 13:47:15,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:15,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:15,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:15,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251804973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:15,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:15,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:15,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643592693] [2021-06-05 13:47:15,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:15,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:15,698 INFO L87 Difference]: Start difference. First operand 23624 states and 91333 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:16,971 INFO L93 Difference]: Finished difference Result 26398 states and 99464 transitions. [2021-06-05 13:47:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:47:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:17,027 INFO L225 Difference]: With dead ends: 26398 [2021-06-05 13:47:17,027 INFO L226 Difference]: Without dead ends: 26377 [2021-06-05 13:47:17,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 722.5ms TimeCoverageRelationStatistics Valid=814, Invalid=3092, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 13:47:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26377 states. [2021-06-05 13:47:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26377 to 23720. [2021-06-05 13:47:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23720 states, 23719 states have (on average 3.8643281757241033) internal successors, (91658), 23719 states have internal predecessors, (91658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23720 states to 23720 states and 91658 transitions. [2021-06-05 13:47:17,480 INFO L78 Accepts]: Start accepts. Automaton has 23720 states and 91658 transitions. Word has length 25 [2021-06-05 13:47:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:17,480 INFO L482 AbstractCegarLoop]: Abstraction has 23720 states and 91658 transitions. [2021-06-05 13:47:17,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 23720 states and 91658 transitions. [2021-06-05 13:47:17,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:17,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:17,516 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:17,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:17,731 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:17,731 INFO L82 PathProgramCache]: Analyzing trace with hash -694735846, now seen corresponding path program 58 times [2021-06-05 13:47:17,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:17,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154432500] [2021-06-05 13:47:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:17,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:17,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154432500] [2021-06-05 13:47:17,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154432500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:17,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634121272] [2021-06-05 13:47:17,764 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 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 13:47:17,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:17,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:17,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:17,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634121272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:17,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:17,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:17,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454796475] [2021-06-05 13:47:17,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:17,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:17,890 INFO L87 Difference]: Start difference. First operand 23720 states and 91658 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:19,375 INFO L93 Difference]: Finished difference Result 26773 states and 100488 transitions. [2021-06-05 13:47:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:47:19,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:19,434 INFO L225 Difference]: With dead ends: 26773 [2021-06-05 13:47:19,434 INFO L226 Difference]: Without dead ends: 26767 [2021-06-05 13:47:19,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 962.8ms TimeCoverageRelationStatistics Valid=1157, Invalid=4245, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 13:47:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26767 states. [2021-06-05 13:47:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26767 to 23647. [2021-06-05 13:47:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23647 states, 23646 states have (on average 3.8645859764865094) internal successors, (91382), 23646 states have internal predecessors, (91382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23647 states to 23647 states and 91382 transitions. [2021-06-05 13:47:19,883 INFO L78 Accepts]: Start accepts. Automaton has 23647 states and 91382 transitions. Word has length 25 [2021-06-05 13:47:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:19,883 INFO L482 AbstractCegarLoop]: Abstraction has 23647 states and 91382 transitions. [2021-06-05 13:47:19,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 23647 states and 91382 transitions. [2021-06-05 13:47:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:19,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:19,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:20,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:20,122 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash -715975424, now seen corresponding path program 59 times [2021-06-05 13:47:20,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:20,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683976153] [2021-06-05 13:47:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:20,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:20,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683976153] [2021-06-05 13:47:20,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683976153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:20,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563215139] [2021-06-05 13:47:20,162 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 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 13:47:20,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:47:20,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:47:20,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:20,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563215139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:20,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:20,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:47:20,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587299924] [2021-06-05 13:47:20,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:47:20,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:47:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:47:20,277 INFO L87 Difference]: Start difference. First operand 23647 states and 91382 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:20,927 INFO L93 Difference]: Finished difference Result 34026 states and 126260 transitions. [2021-06-05 13:47:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:47:20,928 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:21,107 INFO L225 Difference]: With dead ends: 34026 [2021-06-05 13:47:21,107 INFO L226 Difference]: Without dead ends: 33998 [2021-06-05 13:47:21,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:47:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33998 states. [2021-06-05 13:47:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33998 to 23641. [2021-06-05 13:47:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23641 states, 23640 states have (on average 3.8629441624365484) internal successors, (91320), 23640 states have internal predecessors, (91320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23641 states to 23641 states and 91320 transitions. [2021-06-05 13:47:21,557 INFO L78 Accepts]: Start accepts. Automaton has 23641 states and 91320 transitions. Word has length 25 [2021-06-05 13:47:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:21,557 INFO L482 AbstractCegarLoop]: Abstraction has 23641 states and 91320 transitions. [2021-06-05 13:47:21,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 23641 states and 91320 transitions. [2021-06-05 13:47:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:21,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:21,594 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:21,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:21,797 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582306, now seen corresponding path program 60 times [2021-06-05 13:47:21,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:21,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517105028] [2021-06-05 13:47:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:21,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:21,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517105028] [2021-06-05 13:47:21,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517105028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:21,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407583695] [2021-06-05 13:47:21,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:47:21,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:47:21,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:21,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:21,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:21,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407583695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:21,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:21,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:21,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363845981] [2021-06-05 13:47:21,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:21,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:21,976 INFO L87 Difference]: Start difference. First operand 23641 states and 91320 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:22,940 INFO L93 Difference]: Finished difference Result 27117 states and 102184 transitions. [2021-06-05 13:47:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:47:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:23,009 INFO L225 Difference]: With dead ends: 27117 [2021-06-05 13:47:23,009 INFO L226 Difference]: Without dead ends: 27075 [2021-06-05 13:47:23,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:47:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27075 states. [2021-06-05 13:47:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27075 to 23872. [2021-06-05 13:47:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23872 states, 23871 states have (on average 3.8621339700892294) internal successors, (92193), 23871 states have internal predecessors, (92193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23872 states to 23872 states and 92193 transitions. [2021-06-05 13:47:23,482 INFO L78 Accepts]: Start accepts. Automaton has 23872 states and 92193 transitions. Word has length 25 [2021-06-05 13:47:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:23,482 INFO L482 AbstractCegarLoop]: Abstraction has 23872 states and 92193 transitions. [2021-06-05 13:47:23,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 23872 states and 92193 transitions. [2021-06-05 13:47:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:23,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:23,520 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:23,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 13:47:23,720 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1187692774, now seen corresponding path program 61 times [2021-06-05 13:47:23,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:23,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937248199] [2021-06-05 13:47:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:23,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:23,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937248199] [2021-06-05 13:47:23,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937248199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:23,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233838849] [2021-06-05 13:47:23,757 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 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 13:47:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:23,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:23,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:23,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233838849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:23,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:23,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:23,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913291822] [2021-06-05 13:47:23,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:23,889 INFO L87 Difference]: Start difference. First operand 23872 states and 92193 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:25,036 INFO L93 Difference]: Finished difference Result 28292 states and 105726 transitions. [2021-06-05 13:47:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 13:47:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:25,207 INFO L225 Difference]: With dead ends: 28292 [2021-06-05 13:47:25,207 INFO L226 Difference]: Without dead ends: 28257 [2021-06-05 13:47:25,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 749.3ms TimeCoverageRelationStatistics Valid=714, Invalid=2478, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:47:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28257 states. [2021-06-05 13:47:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28257 to 24245. [2021-06-05 13:47:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24245 states, 24244 states have (on average 3.8590166639168455) internal successors, (93558), 24244 states have internal predecessors, (93558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24245 states to 24245 states and 93558 transitions. [2021-06-05 13:47:25,665 INFO L78 Accepts]: Start accepts. Automaton has 24245 states and 93558 transitions. Word has length 25 [2021-06-05 13:47:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:25,665 INFO L482 AbstractCegarLoop]: Abstraction has 24245 states and 93558 transitions. [2021-06-05 13:47:25,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 24245 states and 93558 transitions. [2021-06-05 13:47:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:25,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:25,705 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:25,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 13:47:25,907 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash -83098082, now seen corresponding path program 62 times [2021-06-05 13:47:25,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:25,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789559793] [2021-06-05 13:47:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:25,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:25,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789559793] [2021-06-05 13:47:25,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789559793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:25,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237859752] [2021-06-05 13:47:25,950 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 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 13:47:25,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:25,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:25,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:26,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237859752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:26,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:26,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:26,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628218654] [2021-06-05 13:47:26,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:26,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:26,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:26,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:26,079 INFO L87 Difference]: Start difference. First operand 24245 states and 93558 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:27,303 INFO L93 Difference]: Finished difference Result 28749 states and 107022 transitions. [2021-06-05 13:47:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:47:27,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:27,366 INFO L225 Difference]: With dead ends: 28749 [2021-06-05 13:47:27,367 INFO L226 Difference]: Without dead ends: 28749 [2021-06-05 13:47:27,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 803.0ms TimeCoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 13:47:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28749 states. [2021-06-05 13:47:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28749 to 24026. [2021-06-05 13:47:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.861893860561915) internal successors, (92782), 24025 states have internal predecessors, (92782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 92782 transitions. [2021-06-05 13:47:27,854 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 92782 transitions. Word has length 25 [2021-06-05 13:47:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:27,854 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 92782 transitions. [2021-06-05 13:47:27,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 92782 transitions. [2021-06-05 13:47:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:27,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:27,895 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:28,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 13:47:28,096 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1085733342, now seen corresponding path program 63 times [2021-06-05 13:47:28,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:28,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549410504] [2021-06-05 13:47:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:28,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:28,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549410504] [2021-06-05 13:47:28,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549410504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621889576] [2021-06-05 13:47:28,128 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 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 13:47:28,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:28,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:28,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621889576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:28,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:28,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:47:28,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219150600] [2021-06-05 13:47:28,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:47:28,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:28,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:47:28,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:28,263 INFO L87 Difference]: Start difference. First operand 24026 states and 92782 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:29,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:29,606 INFO L93 Difference]: Finished difference Result 29221 states and 108781 transitions. [2021-06-05 13:47:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:47:29,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:29,675 INFO L225 Difference]: With dead ends: 29221 [2021-06-05 13:47:29,675 INFO L226 Difference]: Without dead ends: 29217 [2021-06-05 13:47:29,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 875.9ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 13:47:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29217 states. [2021-06-05 13:47:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29217 to 24082. [2021-06-05 13:47:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24082 states, 24081 states have (on average 3.8637099788214777) internal successors, (93042), 24081 states have internal predecessors, (93042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24082 states to 24082 states and 93042 transitions. [2021-06-05 13:47:30,143 INFO L78 Accepts]: Start accepts. Automaton has 24082 states and 93042 transitions. Word has length 25 [2021-06-05 13:47:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:30,143 INFO L482 AbstractCegarLoop]: Abstraction has 24082 states and 93042 transitions. [2021-06-05 13:47:30,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:30,144 INFO L276 IsEmpty]: Start isEmpty. Operand 24082 states and 93042 transitions. [2021-06-05 13:47:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:30,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:30,183 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:30,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 13:47:30,383 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:30,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2122415066, now seen corresponding path program 64 times [2021-06-05 13:47:30,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:30,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983761547] [2021-06-05 13:47:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:47:30,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:30,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983761547] [2021-06-05 13:47:30,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983761547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:30,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663675493] [2021-06-05 13:47:30,414 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 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 13:47:30,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:30,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:30,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:30,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:30,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663675493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:30,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:30,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:47:30,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701598858] [2021-06-05 13:47:30,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:47:30,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:30,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:47:30,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:47:30,542 INFO L87 Difference]: Start difference. First operand 24082 states and 93042 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:31,729 INFO L93 Difference]: Finished difference Result 29744 states and 110313 transitions. [2021-06-05 13:47:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 13:47:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:31,794 INFO L225 Difference]: With dead ends: 29744 [2021-06-05 13:47:31,794 INFO L226 Difference]: Without dead ends: 29744 [2021-06-05 13:47:31,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=793, Invalid=2513, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 13:47:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29744 states. [2021-06-05 13:47:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29744 to 24037. [2021-06-05 13:47:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8625395240472624) internal successors, (92840), 24036 states have internal predecessors, (92840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92840 transitions. [2021-06-05 13:47:32,255 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92840 transitions. Word has length 25 [2021-06-05 13:47:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:32,256 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92840 transitions. [2021-06-05 13:47:32,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92840 transitions. [2021-06-05 13:47:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:32,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:32,290 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:32,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 13:47:32,490 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1922178658, now seen corresponding path program 65 times [2021-06-05 13:47:32,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:32,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288359503] [2021-06-05 13:47:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:32,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:32,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288359503] [2021-06-05 13:47:32,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288359503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:32,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668821165] [2021-06-05 13:47:32,522 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 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 13:47:32,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:47:32,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:32,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:32,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:32,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668821165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:32,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:32,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:32,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894288570] [2021-06-05 13:47:32,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:32,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:32,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:32,646 INFO L87 Difference]: Start difference. First operand 24037 states and 92840 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:33,402 INFO L93 Difference]: Finished difference Result 27264 states and 102651 transitions. [2021-06-05 13:47:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:47:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:33,460 INFO L225 Difference]: With dead ends: 27264 [2021-06-05 13:47:33,460 INFO L226 Difference]: Without dead ends: 27186 [2021-06-05 13:47:33,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:47:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27186 states. [2021-06-05 13:47:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27186 to 24037. [2021-06-05 13:47:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8620402729239474) internal successors, (92828), 24036 states have internal predecessors, (92828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92828 transitions. [2021-06-05 13:47:33,908 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92828 transitions. Word has length 25 [2021-06-05 13:47:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:33,908 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92828 transitions. [2021-06-05 13:47:33,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92828 transitions. [2021-06-05 13:47:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:33,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:33,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:34,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:34,146 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:34,146 INFO L82 PathProgramCache]: Analyzing trace with hash -516161122, now seen corresponding path program 66 times [2021-06-05 13:47:34,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:34,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569344161] [2021-06-05 13:47:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:34,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:34,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569344161] [2021-06-05 13:47:34,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569344161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:34,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525919110] [2021-06-05 13:47:34,178 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 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 13:47:34,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:47:34,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:34,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:34,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:34,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525919110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:34,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:34,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:34,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079273954] [2021-06-05 13:47:34,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:34,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:34,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:34,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:34,306 INFO L87 Difference]: Start difference. First operand 24037 states and 92828 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:35,011 INFO L93 Difference]: Finished difference Result 27092 states and 102183 transitions. [2021-06-05 13:47:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:47:35,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:35,073 INFO L225 Difference]: With dead ends: 27092 [2021-06-05 13:47:35,074 INFO L226 Difference]: Without dead ends: 27014 [2021-06-05 13:47:35,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:47:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27014 states. [2021-06-05 13:47:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27014 to 24197. [2021-06-05 13:47:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24197 states, 24196 states have (on average 3.8581997024301535) internal successors, (93353), 24196 states have internal predecessors, (93353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24197 states to 24197 states and 93353 transitions. [2021-06-05 13:47:35,523 INFO L78 Accepts]: Start accepts. Automaton has 24197 states and 93353 transitions. Word has length 25 [2021-06-05 13:47:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:35,523 INFO L482 AbstractCegarLoop]: Abstraction has 24197 states and 93353 transitions. [2021-06-05 13:47:35,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 24197 states and 93353 transitions. [2021-06-05 13:47:35,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:35,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:35,559 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:35,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 13:47:35,760 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:35,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1450570906, now seen corresponding path program 67 times [2021-06-05 13:47:35,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:35,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906210903] [2021-06-05 13:47:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:35,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906210903] [2021-06-05 13:47:35,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906210903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:35,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023015575] [2021-06-05 13:47:35,797 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 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 13:47:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:35,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:35,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023015575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:35,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:35,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:35,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753345321] [2021-06-05 13:47:35,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:35,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:35,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:35,922 INFO L87 Difference]: Start difference. First operand 24197 states and 93353 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:36,853 INFO L93 Difference]: Finished difference Result 29237 states and 108599 transitions. [2021-06-05 13:47:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:47:36,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:36,923 INFO L225 Difference]: With dead ends: 29237 [2021-06-05 13:47:36,923 INFO L226 Difference]: Without dead ends: 29132 [2021-06-05 13:47:36,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 13:47:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29132 states. [2021-06-05 13:47:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29132 to 24578. [2021-06-05 13:47:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24578 states, 24577 states have (on average 3.8505920169263947) internal successors, (94636), 24577 states have internal predecessors, (94636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24578 states to 24578 states and 94636 transitions. [2021-06-05 13:47:37,563 INFO L78 Accepts]: Start accepts. Automaton has 24578 states and 94636 transitions. Word has length 25 [2021-06-05 13:47:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:37,563 INFO L482 AbstractCegarLoop]: Abstraction has 24578 states and 94636 transitions. [2021-06-05 13:47:37,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 24578 states and 94636 transitions. [2021-06-05 13:47:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:37,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:37,604 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:37,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 13:47:37,805 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1651929958, now seen corresponding path program 68 times [2021-06-05 13:47:37,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:37,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947600146] [2021-06-05 13:47:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:37,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:37,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947600146] [2021-06-05 13:47:37,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947600146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:37,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012724249] [2021-06-05 13:47:37,836 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 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 13:47:37,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:37,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:37,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012724249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:37,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:37,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:37,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409202029] [2021-06-05 13:47:37,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:37,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:37,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:37,963 INFO L87 Difference]: Start difference. First operand 24578 states and 94636 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:39,066 INFO L93 Difference]: Finished difference Result 30260 states and 111728 transitions. [2021-06-05 13:47:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:47:39,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:39,130 INFO L225 Difference]: With dead ends: 30260 [2021-06-05 13:47:39,130 INFO L226 Difference]: Without dead ends: 30225 [2021-06-05 13:47:39,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 766.7ms TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:47:39,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30225 states. [2021-06-05 13:47:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30225 to 25387. [2021-06-05 13:47:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25387 states, 25386 states have (on average 3.8439691168360515) internal successors, (97583), 25386 states have internal predecessors, (97583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25387 states to 25387 states and 97583 transitions. [2021-06-05 13:47:39,685 INFO L78 Accepts]: Start accepts. Automaton has 25387 states and 97583 transitions. Word has length 25 [2021-06-05 13:47:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:39,685 INFO L482 AbstractCegarLoop]: Abstraction has 25387 states and 97583 transitions. [2021-06-05 13:47:39,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 25387 states and 97583 transitions. [2021-06-05 13:47:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:39,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:39,730 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:39,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:39,931 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:39,931 INFO L82 PathProgramCache]: Analyzing trace with hash -547335266, now seen corresponding path program 69 times [2021-06-05 13:47:39,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:39,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536012841] [2021-06-05 13:47:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:39,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536012841] [2021-06-05 13:47:39,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536012841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073144116] [2021-06-05 13:47:39,967 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 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 13:47:39,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:47:39,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:39,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:39,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:40,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073144116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:40,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:40,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:40,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506560414] [2021-06-05 13:47:40,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:40,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:40,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:40,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:40,094 INFO L87 Difference]: Start difference. First operand 25387 states and 97583 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:41,437 INFO L93 Difference]: Finished difference Result 30555 states and 112516 transitions. [2021-06-05 13:47:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:47:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:41,503 INFO L225 Difference]: With dead ends: 30555 [2021-06-05 13:47:41,503 INFO L226 Difference]: Without dead ends: 30555 [2021-06-05 13:47:41,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 13:47:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30555 states. [2021-06-05 13:47:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30555 to 24735. [2021-06-05 13:47:42,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24735 states, 24734 states have (on average 3.8523894234656746) internal successors, (95285), 24734 states have internal predecessors, (95285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24735 states to 24735 states and 95285 transitions. [2021-06-05 13:47:42,119 INFO L78 Accepts]: Start accepts. Automaton has 24735 states and 95285 transitions. Word has length 25 [2021-06-05 13:47:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:42,119 INFO L482 AbstractCegarLoop]: Abstraction has 24735 states and 95285 transitions. [2021-06-05 13:47:42,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 24735 states and 95285 transitions. [2021-06-05 13:47:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:42,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:42,164 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:42,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:42,364 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:42,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:42,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1344648230, now seen corresponding path program 70 times [2021-06-05 13:47:42,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:42,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678705076] [2021-06-05 13:47:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:42,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:42,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678705076] [2021-06-05 13:47:42,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678705076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:42,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981186644] [2021-06-05 13:47:42,400 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 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 13:47:42,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:42,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:42,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:42,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:42,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981186644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:42,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:42,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:42,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870945096] [2021-06-05 13:47:42,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:42,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:42,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:42,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:42,535 INFO L87 Difference]: Start difference. First operand 24735 states and 95285 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:43,384 INFO L93 Difference]: Finished difference Result 29274 states and 109319 transitions. [2021-06-05 13:47:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:47:43,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:43,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:43,456 INFO L225 Difference]: With dead ends: 29274 [2021-06-05 13:47:43,457 INFO L226 Difference]: Without dead ends: 29190 [2021-06-05 13:47:43,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 542.4ms TimeCoverageRelationStatistics Valid=554, Invalid=1996, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:47:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29190 states. [2021-06-05 13:47:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29190 to 24885. [2021-06-05 13:47:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24885 states, 24884 states have (on average 3.8572174891496545) internal successors, (95983), 24884 states have internal predecessors, (95983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24885 states to 24885 states and 95983 transitions. [2021-06-05 13:47:44,030 INFO L78 Accepts]: Start accepts. Automaton has 24885 states and 95983 transitions. Word has length 25 [2021-06-05 13:47:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:44,030 INFO L482 AbstractCegarLoop]: Abstraction has 24885 states and 95983 transitions. [2021-06-05 13:47:44,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 24885 states and 95983 transitions. [2021-06-05 13:47:44,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:44,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:44,079 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:44,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:44,279 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:44,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1878537762, now seen corresponding path program 71 times [2021-06-05 13:47:44,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:44,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492917983] [2021-06-05 13:47:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:44,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492917983] [2021-06-05 13:47:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492917983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194935679] [2021-06-05 13:47:44,311 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 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 13:47:44,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:47:44,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:44,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194935679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:44,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:44,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:44,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350043726] [2021-06-05 13:47:44,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:44,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:44,434 INFO L87 Difference]: Start difference. First operand 24885 states and 95983 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:45,516 INFO L93 Difference]: Finished difference Result 30288 states and 112309 transitions. [2021-06-05 13:47:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:47:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:45,590 INFO L225 Difference]: With dead ends: 30288 [2021-06-05 13:47:45,591 INFO L226 Difference]: Without dead ends: 30239 [2021-06-05 13:47:45,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 674.4ms TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:47:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30239 states. [2021-06-05 13:47:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30239 to 25177. [2021-06-05 13:47:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25177 states, 25176 states have (on average 3.852240228789323) internal successors, (96984), 25176 states have internal predecessors, (96984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25177 states to 25177 states and 96984 transitions. [2021-06-05 13:47:46,244 INFO L78 Accepts]: Start accepts. Automaton has 25177 states and 96984 transitions. Word has length 25 [2021-06-05 13:47:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:46,244 INFO L482 AbstractCegarLoop]: Abstraction has 25177 states and 96984 transitions. [2021-06-05 13:47:46,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25177 states and 96984 transitions. [2021-06-05 13:47:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:46,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:46,292 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:46,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:47:46,493 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:46,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:46,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1311834842, now seen corresponding path program 72 times [2021-06-05 13:47:46,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:46,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585939759] [2021-06-05 13:47:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:46,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:46,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585939759] [2021-06-05 13:47:46,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585939759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:46,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573879410] [2021-06-05 13:47:46,527 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 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 13:47:46,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:47:46,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:46,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:46,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:46,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573879410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:46,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:46,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:46,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208285246] [2021-06-05 13:47:46,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:46,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:46,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:46,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:46,650 INFO L87 Difference]: Start difference. First operand 25177 states and 96984 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:48,011 INFO L93 Difference]: Finished difference Result 30750 states and 113565 transitions. [2021-06-05 13:47:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:47:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:48,083 INFO L225 Difference]: With dead ends: 30750 [2021-06-05 13:47:48,083 INFO L226 Difference]: Without dead ends: 30750 [2021-06-05 13:47:48,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 904.9ms TimeCoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 13:47:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30750 states. [2021-06-05 13:47:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30750 to 24767. [2021-06-05 13:47:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24767 states, 24766 states have (on average 3.85887910845514) internal successors, (95569), 24766 states have internal predecessors, (95569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:48,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24767 states to 24767 states and 95569 transitions. [2021-06-05 13:47:48,631 INFO L78 Accepts]: Start accepts. Automaton has 24767 states and 95569 transitions. Word has length 25 [2021-06-05 13:47:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:48,631 INFO L482 AbstractCegarLoop]: Abstraction has 24767 states and 95569 transitions. [2021-06-05 13:47:48,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:48,631 INFO L276 IsEmpty]: Start isEmpty. Operand 24767 states and 95569 transitions. [2021-06-05 13:47:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:48,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:48,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:48,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 13:47:48,885 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:48,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:48,885 INFO L82 PathProgramCache]: Analyzing trace with hash -118473758, now seen corresponding path program 73 times [2021-06-05 13:47:48,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:48,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419830123] [2021-06-05 13:47:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:48,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419830123] [2021-06-05 13:47:48,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419830123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633221074] [2021-06-05 13:47:48,954 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 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 13:47:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:48,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:49,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633221074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:49,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:49,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55796515] [2021-06-05 13:47:49,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:49,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:49,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:49,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:49,102 INFO L87 Difference]: Start difference. First operand 24767 states and 95569 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:50,304 INFO L93 Difference]: Finished difference Result 29361 states and 109742 transitions. [2021-06-05 13:47:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 13:47:50,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:50,370 INFO L225 Difference]: With dead ends: 29361 [2021-06-05 13:47:50,370 INFO L226 Difference]: Without dead ends: 29361 [2021-06-05 13:47:50,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=933, Invalid=2973, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 13:47:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29361 states. [2021-06-05 13:47:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29361 to 25043. [2021-06-05 13:47:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25043 states, 25042 states have (on average 3.864188163884674) internal successors, (96767), 25042 states have internal predecessors, (96767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25043 states to 25043 states and 96767 transitions. [2021-06-05 13:47:51,062 INFO L78 Accepts]: Start accepts. Automaton has 25043 states and 96767 transitions. Word has length 25 [2021-06-05 13:47:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:51,062 INFO L482 AbstractCegarLoop]: Abstraction has 25043 states and 96767 transitions. [2021-06-05 13:47:51,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 25043 states and 96767 transitions. [2021-06-05 13:47:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:51,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:51,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:51,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 13:47:51,309 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash -245349406, now seen corresponding path program 74 times [2021-06-05 13:47:51,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:51,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062295510] [2021-06-05 13:47:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:51,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:51,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062295510] [2021-06-05 13:47:51,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062295510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:51,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262722347] [2021-06-05 13:47:51,341 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 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 13:47:51,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:47:51,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:51,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:51,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:51,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262722347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:51,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:51,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:51,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886447795] [2021-06-05 13:47:51,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:51,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:51,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:51,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:51,463 INFO L87 Difference]: Start difference. First operand 25043 states and 96767 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:52,417 INFO L93 Difference]: Finished difference Result 28982 states and 108706 transitions. [2021-06-05 13:47:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:47:52,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:52,481 INFO L225 Difference]: With dead ends: 28982 [2021-06-05 13:47:52,481 INFO L226 Difference]: Without dead ends: 28947 [2021-06-05 13:47:52,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:47:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28947 states. [2021-06-05 13:47:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28947 to 25033. [2021-06-05 13:47:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.8635346756152127) internal successors, (96712), 25032 states have internal predecessors, (96712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 96712 transitions. [2021-06-05 13:47:53,012 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 96712 transitions. Word has length 25 [2021-06-05 13:47:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:53,012 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 96712 transitions. [2021-06-05 13:47:53,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 96712 transitions. [2021-06-05 13:47:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:53,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:53,056 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:53,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 13:47:53,256 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash 540103142, now seen corresponding path program 75 times [2021-06-05 13:47:53,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:53,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924234068] [2021-06-05 13:47:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:53,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:53,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924234068] [2021-06-05 13:47:53,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924234068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:53,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974811391] [2021-06-05 13:47:53,289 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 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 13:47:53,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:47:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:53,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:53,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:53,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974811391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:53,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:53,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:53,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020223530] [2021-06-05 13:47:53,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:53,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:53,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:53,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:53,411 INFO L87 Difference]: Start difference. First operand 25033 states and 96712 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:54,745 INFO L93 Difference]: Finished difference Result 33306 states and 122305 transitions. [2021-06-05 13:47:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 13:47:54,745 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:54,821 INFO L225 Difference]: With dead ends: 33306 [2021-06-05 13:47:54,821 INFO L226 Difference]: Without dead ends: 33306 [2021-06-05 13:47:54,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 798.1ms TimeCoverageRelationStatistics Valid=914, Invalid=2868, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 13:47:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33306 states. [2021-06-05 13:47:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33306 to 25063. [2021-06-05 13:47:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25063 states, 25062 states have (on average 3.864855159205171) internal successors, (96861), 25062 states have internal predecessors, (96861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25063 states to 25063 states and 96861 transitions. [2021-06-05 13:47:55,392 INFO L78 Accepts]: Start accepts. Automaton has 25063 states and 96861 transitions. Word has length 25 [2021-06-05 13:47:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:55,392 INFO L482 AbstractCegarLoop]: Abstraction has 25063 states and 96861 transitions. [2021-06-05 13:47:55,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 25063 states and 96861 transitions. [2021-06-05 13:47:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:55,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:55,436 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:55,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 13:47:55,636 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:55,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1576784866, now seen corresponding path program 76 times [2021-06-05 13:47:55,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:55,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189065653] [2021-06-05 13:47:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:55,781 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 13:47:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:55,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:55,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189065653] [2021-06-05 13:47:55,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189065653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:55,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21525912] [2021-06-05 13:47:55,808 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 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 13:47:55,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:47:55,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:55,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21525912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:55,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:55,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:55,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123325767] [2021-06-05 13:47:55,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:55,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:55,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:55,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:55,945 INFO L87 Difference]: Start difference. First operand 25063 states and 96861 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:57,277 INFO L93 Difference]: Finished difference Result 33343 states and 122559 transitions. [2021-06-05 13:47:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 13:47:57,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:57,355 INFO L225 Difference]: With dead ends: 33343 [2021-06-05 13:47:57,356 INFO L226 Difference]: Without dead ends: 33343 [2021-06-05 13:47:57,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 890.1ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:47:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33343 states. [2021-06-05 13:47:57,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33343 to 25038. [2021-06-05 13:47:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 3.8631625194711825) internal successors, (96722), 25037 states have internal predecessors, (96722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 96722 transitions. [2021-06-05 13:47:57,926 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 96722 transitions. Word has length 25 [2021-06-05 13:47:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:57,926 INFO L482 AbstractCegarLoop]: Abstraction has 25038 states and 96722 transitions. [2021-06-05 13:47:57,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 96722 transitions. [2021-06-05 13:47:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:57,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:57,971 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:47:58,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 13:47:58,171 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:47:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:47:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1028006882, now seen corresponding path program 77 times [2021-06-05 13:47:58,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:47:58,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909964558] [2021-06-05 13:47:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:47:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:47:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:58,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:47:58,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909964558] [2021-06-05 13:47:58,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909964558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:58,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969912094] [2021-06-05 13:47:58,204 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 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 13:47:58,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:47:58,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:47:58,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:47:58,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:47:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:47:58,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969912094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:47:58,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:47:58,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:47:58,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574814745] [2021-06-05 13:47:58,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:47:58,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:47:58,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:47:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:47:58,333 INFO L87 Difference]: Start difference. First operand 25038 states and 96722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:47:59,315 INFO L93 Difference]: Finished difference Result 29062 states and 108937 transitions. [2021-06-05 13:47:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:47:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:47:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:47:59,384 INFO L225 Difference]: With dead ends: 29062 [2021-06-05 13:47:59,384 INFO L226 Difference]: Without dead ends: 29027 [2021-06-05 13:47:59,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 540.5ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:47:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29027 states. [2021-06-05 13:47:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29027 to 25065. [2021-06-05 13:47:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25065 states, 25064 states have (on average 3.8628311522502394) internal successors, (96818), 25064 states have internal predecessors, (96818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25065 states to 25065 states and 96818 transitions. [2021-06-05 13:47:59,898 INFO L78 Accepts]: Start accepts. Automaton has 25065 states and 96818 transitions. Word has length 25 [2021-06-05 13:47:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:47:59,898 INFO L482 AbstractCegarLoop]: Abstraction has 25065 states and 96818 transitions. [2021-06-05 13:47:59,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:47:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25065 states and 96818 transitions. [2021-06-05 13:47:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:47:59,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:47:59,944 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:00,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 13:48:00,144 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2132601574, now seen corresponding path program 78 times [2021-06-05 13:48:00,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:00,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987150912] [2021-06-05 13:48:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:00,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:00,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987150912] [2021-06-05 13:48:00,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987150912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:00,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215796484] [2021-06-05 13:48:00,181 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 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 13:48:00,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:48:00,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:00,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:48:00,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:00,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215796484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:00,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:00,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:48:00,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699493883] [2021-06-05 13:48:00,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:00,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:00,303 INFO L87 Difference]: Start difference. First operand 25065 states and 96818 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:01,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:01,517 INFO L93 Difference]: Finished difference Result 29427 states and 110008 transitions. [2021-06-05 13:48:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 13:48:01,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:01,586 INFO L225 Difference]: With dead ends: 29427 [2021-06-05 13:48:01,586 INFO L226 Difference]: Without dead ends: 29427 [2021-06-05 13:48:01,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 749.7ms TimeCoverageRelationStatistics Valid=879, Invalid=2903, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 13:48:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29427 states. [2021-06-05 13:48:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29427 to 25026. [2021-06-05 13:48:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25026 states, 25025 states have (on average 3.863256743256743) internal successors, (96678), 25025 states have internal predecessors, (96678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25026 states to 25026 states and 96678 transitions. [2021-06-05 13:48:02,071 INFO L78 Accepts]: Start accepts. Automaton has 25026 states and 96678 transitions. Word has length 25 [2021-06-05 13:48:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:02,071 INFO L482 AbstractCegarLoop]: Abstraction has 25026 states and 96678 transitions. [2021-06-05 13:48:02,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25026 states and 96678 transitions. [2021-06-05 13:48:02,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:02,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:02,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:02,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:02,316 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:02,316 INFO L82 PathProgramCache]: Analyzing trace with hash 2042881808, now seen corresponding path program 47 times [2021-06-05 13:48:02,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:02,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847894350] [2021-06-05 13:48:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:02,341 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 13:48:02,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:02,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847894350] [2021-06-05 13:48:02,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847894350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:02,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649699002] [2021-06-05 13:48:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:02,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:48:02,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:02,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:48:02,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:02,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649699002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:02,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:02,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 13:48:02,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105623235] [2021-06-05 13:48:02,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:48:02,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:02,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:48:02,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:48:02,433 INFO L87 Difference]: Start difference. First operand 25026 states and 96678 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 13:48:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:02,791 INFO L93 Difference]: Finished difference Result 35828 states and 129668 transitions. [2021-06-05 13:48:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:48:02,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:02,875 INFO L225 Difference]: With dead ends: 35828 [2021-06-05 13:48:02,875 INFO L226 Difference]: Without dead ends: 35821 [2021-06-05 13:48:02,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:48:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35821 states. [2021-06-05 13:48:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35821 to 24552. [2021-06-05 13:48:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24552 states, 24551 states have (on average 3.8637937354893896) internal successors, (94860), 24551 states have internal predecessors, (94860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24552 states to 24552 states and 94860 transitions. [2021-06-05 13:48:03,539 INFO L78 Accepts]: Start accepts. Automaton has 24552 states and 94860 transitions. Word has length 25 [2021-06-05 13:48:03,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:03,540 INFO L482 AbstractCegarLoop]: Abstraction has 24552 states and 94860 transitions. [2021-06-05 13:48:03,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 13:48:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 24552 states and 94860 transitions. [2021-06-05 13:48:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:03,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:03,584 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:03,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:03,793 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash -630380332, now seen corresponding path program 48 times [2021-06-05 13:48:03,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:03,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062097445] [2021-06-05 13:48:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:03,815 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 13:48:03,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:03,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062097445] [2021-06-05 13:48:03,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062097445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:03,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640250337] [2021-06-05 13:48:03,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:03,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:48:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:48:03,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:03,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640250337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:03,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:03,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:48:03,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966955068] [2021-06-05 13:48:03,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:48:03,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:03,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:48:03,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:48:03,897 INFO L87 Difference]: Start difference. First operand 24552 states and 94860 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:04,251 INFO L93 Difference]: Finished difference Result 44652 states and 164681 transitions. [2021-06-05 13:48:04,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:48:04,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:04,365 INFO L225 Difference]: With dead ends: 44652 [2021-06-05 13:48:04,366 INFO L226 Difference]: Without dead ends: 44652 [2021-06-05 13:48:04,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:48:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44652 states. [2021-06-05 13:48:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44652 to 32844. [2021-06-05 13:48:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32844 states, 32843 states have (on average 3.910117833328259) internal successors, (128420), 32843 states have internal predecessors, (128420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32844 states to 32844 states and 128420 transitions. [2021-06-05 13:48:05,214 INFO L78 Accepts]: Start accepts. Automaton has 32844 states and 128420 transitions. Word has length 25 [2021-06-05 13:48:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:05,214 INFO L482 AbstractCegarLoop]: Abstraction has 32844 states and 128420 transitions. [2021-06-05 13:48:05,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 32844 states and 128420 transitions. [2021-06-05 13:48:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:05,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:05,272 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:05,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:05,473 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:05,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1477189716, now seen corresponding path program 49 times [2021-06-05 13:48:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:05,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815305380] [2021-06-05 13:48:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:05,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:05,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815305380] [2021-06-05 13:48:05,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815305380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:05,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677781392] [2021-06-05 13:48:05,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:48:05,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:05,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677781392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:05,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:05,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:48:05,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311092106] [2021-06-05 13:48:05,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:05,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:05,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:05,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:05,645 INFO L87 Difference]: Start difference. First operand 32844 states and 128420 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:06,291 INFO L93 Difference]: Finished difference Result 33629 states and 130552 transitions. [2021-06-05 13:48:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:48:06,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:06,373 INFO L225 Difference]: With dead ends: 33629 [2021-06-05 13:48:06,373 INFO L226 Difference]: Without dead ends: 33615 [2021-06-05 13:48:06,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:48:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33615 states. [2021-06-05 13:48:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33615 to 33084. [2021-06-05 13:48:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33084 states, 33083 states have (on average 3.9054499289665388) internal successors, (129204), 33083 states have internal predecessors, (129204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33084 states to 33084 states and 129204 transitions. [2021-06-05 13:48:07,342 INFO L78 Accepts]: Start accepts. Automaton has 33084 states and 129204 transitions. Word has length 25 [2021-06-05 13:48:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:07,343 INFO L482 AbstractCegarLoop]: Abstraction has 33084 states and 129204 transitions. [2021-06-05 13:48:07,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 33084 states and 129204 transitions. [2021-06-05 13:48:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:07,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:07,404 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:07,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:07,604 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:07,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1713182888, now seen corresponding path program 50 times [2021-06-05 13:48:07,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:07,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064623488] [2021-06-05 13:48:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:07,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:07,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064623488] [2021-06-05 13:48:07,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064623488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:07,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939395700] [2021-06-05 13:48:07,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:07,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:07,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:48:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:07,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939395700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:07,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:07,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:48:07,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154755237] [2021-06-05 13:48:07,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:07,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:07,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:07,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:07,941 INFO L87 Difference]: Start difference. First operand 33084 states and 129204 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:08,667 INFO L93 Difference]: Finished difference Result 33760 states and 130979 transitions. [2021-06-05 13:48:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:48:08,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:08,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:08,826 INFO L225 Difference]: With dead ends: 33760 [2021-06-05 13:48:08,827 INFO L226 Difference]: Without dead ends: 33754 [2021-06-05 13:48:08,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 657.4ms TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:48:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33754 states. [2021-06-05 13:48:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33754 to 33087. [2021-06-05 13:48:09,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33087 states, 33086 states have (on average 3.9052469322372) internal successors, (129209), 33086 states have internal predecessors, (129209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33087 states to 33087 states and 129209 transitions. [2021-06-05 13:48:09,614 INFO L78 Accepts]: Start accepts. Automaton has 33087 states and 129209 transitions. Word has length 25 [2021-06-05 13:48:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:09,614 INFO L482 AbstractCegarLoop]: Abstraction has 33087 states and 129209 transitions. [2021-06-05 13:48:09,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33087 states and 129209 transitions. [2021-06-05 13:48:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:09,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:09,678 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:09,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:09,878 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:09,879 INFO L82 PathProgramCache]: Analyzing trace with hash 889676572, now seen corresponding path program 51 times [2021-06-05 13:48:09,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:09,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780225513] [2021-06-05 13:48:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:09,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:09,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780225513] [2021-06-05 13:48:09,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780225513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:09,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981501576] [2021-06-05 13:48:09,902 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 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 13:48:09,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:48:09,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:48:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:09,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981501576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:09,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:09,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 13:48:09,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133176912] [2021-06-05 13:48:09,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:48:09,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:09,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:48:09,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:48:09,982 INFO L87 Difference]: Start difference. First operand 33087 states and 129209 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:10,393 INFO L93 Difference]: Finished difference Result 41266 states and 153993 transitions. [2021-06-05 13:48:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:48:10,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:10,488 INFO L225 Difference]: With dead ends: 41266 [2021-06-05 13:48:10,488 INFO L226 Difference]: Without dead ends: 41260 [2021-06-05 13:48:10,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:48:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41260 states. [2021-06-05 13:48:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41260 to 33073. [2021-06-05 13:48:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33073 states, 33072 states have (on average 3.904360183841316) internal successors, (129125), 33072 states have internal predecessors, (129125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33073 states to 33073 states and 129125 transitions. [2021-06-05 13:48:11,413 INFO L78 Accepts]: Start accepts. Automaton has 33073 states and 129125 transitions. Word has length 25 [2021-06-05 13:48:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:11,413 INFO L482 AbstractCegarLoop]: Abstraction has 33073 states and 129125 transitions. [2021-06-05 13:48:11,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 33073 states and 129125 transitions. [2021-06-05 13:48:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:11,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:11,469 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:11,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 13:48:11,669 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:11,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1922155786, now seen corresponding path program 52 times [2021-06-05 13:48:11,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:11,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853013233] [2021-06-05 13:48:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:11,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:11,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853013233] [2021-06-05 13:48:11,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853013233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:11,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692883442] [2021-06-05 13:48:11,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:11,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:11,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:48:11,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:48:11,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692883442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:11,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:11,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 13:48:11,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091298169] [2021-06-05 13:48:11,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:48:11,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:11,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:48:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:48:11,874 INFO L87 Difference]: Start difference. First operand 33073 states and 129125 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 13:48:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:12,218 INFO L93 Difference]: Finished difference Result 41324 states and 154127 transitions. [2021-06-05 13:48:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:48:12,219 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 25 [2021-06-05 13:48:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:12,323 INFO L225 Difference]: With dead ends: 41324 [2021-06-05 13:48:12,323 INFO L226 Difference]: Without dead ends: 41306 [2021-06-05 13:48:12,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:48:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41306 states. [2021-06-05 13:48:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41306 to 33052. [2021-06-05 13:48:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33052 states, 33051 states have (on average 3.903543009288675) internal successors, (129016), 33051 states have internal predecessors, (129016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33052 states to 33052 states and 129016 transitions. [2021-06-05 13:48:13,132 INFO L78 Accepts]: Start accepts. Automaton has 33052 states and 129016 transitions. Word has length 25 [2021-06-05 13:48:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:13,133 INFO L482 AbstractCegarLoop]: Abstraction has 33052 states and 129016 transitions. [2021-06-05 13:48:13,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 13:48:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 33052 states and 129016 transitions. [2021-06-05 13:48:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:13,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:13,192 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:13,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 13:48:13,392 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash -376083974, now seen corresponding path program 53 times [2021-06-05 13:48:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445578473] [2021-06-05 13:48:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:13,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:13,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445578473] [2021-06-05 13:48:13,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445578473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:13,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127454896] [2021-06-05 13:48:13,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:13,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:48:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:48:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:13,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127454896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:13,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:13,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 13:48:13,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587731427] [2021-06-05 13:48:13,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:48:13,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:13,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:48:13,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:48:13,501 INFO L87 Difference]: Start difference. First operand 33052 states and 129016 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:13,963 INFO L93 Difference]: Finished difference Result 41161 states and 153593 transitions. [2021-06-05 13:48:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:48:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:14,068 INFO L225 Difference]: With dead ends: 41161 [2021-06-05 13:48:14,068 INFO L226 Difference]: Without dead ends: 41131 [2021-06-05 13:48:14,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:48:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41131 states. [2021-06-05 13:48:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41131 to 33160. [2021-06-05 13:48:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33160 states, 33159 states have (on average 3.900660454175337) internal successors, (129342), 33159 states have internal predecessors, (129342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33160 states to 33160 states and 129342 transitions. [2021-06-05 13:48:15,134 INFO L78 Accepts]: Start accepts. Automaton has 33160 states and 129342 transitions. Word has length 25 [2021-06-05 13:48:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:15,134 INFO L482 AbstractCegarLoop]: Abstraction has 33160 states and 129342 transitions. [2021-06-05 13:48:15,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 33160 states and 129342 transitions. [2021-06-05 13:48:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:15,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:15,193 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:15,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 13:48:15,394 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:15,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1609809744, now seen corresponding path program 79 times [2021-06-05 13:48:15,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:15,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64766766] [2021-06-05 13:48:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:15,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:15,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64766766] [2021-06-05 13:48:15,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64766766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:15,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504549511] [2021-06-05 13:48:15,425 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 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 13:48:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:15,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504549511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:15,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:15,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:15,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178559208] [2021-06-05 13:48:15,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:15,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:15,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:15,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:15,541 INFO L87 Difference]: Start difference. First operand 33160 states and 129342 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:17,329 INFO L93 Difference]: Finished difference Result 66239 states and 248356 transitions. [2021-06-05 13:48:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 13:48:17,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:17,638 INFO L225 Difference]: With dead ends: 66239 [2021-06-05 13:48:17,638 INFO L226 Difference]: Without dead ends: 66187 [2021-06-05 13:48:17,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 1122.4ms TimeCoverageRelationStatistics Valid=1425, Invalid=5055, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 13:48:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66187 states. [2021-06-05 13:48:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66187 to 38023. [2021-06-05 13:48:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38023 states, 38022 states have (on average 3.936904949765925) internal successors, (149689), 38022 states have internal predecessors, (149689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38023 states to 38023 states and 149689 transitions. [2021-06-05 13:48:18,820 INFO L78 Accepts]: Start accepts. Automaton has 38023 states and 149689 transitions. Word has length 25 [2021-06-05 13:48:18,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:18,820 INFO L482 AbstractCegarLoop]: Abstraction has 38023 states and 149689 transitions. [2021-06-05 13:48:18,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 38023 states and 149689 transitions. [2021-06-05 13:48:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:18,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:18,896 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:19,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 13:48:19,096 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1706600108, now seen corresponding path program 80 times [2021-06-05 13:48:19,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:19,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273650142] [2021-06-05 13:48:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:19,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:19,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273650142] [2021-06-05 13:48:19,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273650142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:19,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478726703] [2021-06-05 13:48:19,128 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 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 13:48:19,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:19,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:19,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:19,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:19,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478726703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:19,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:19,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:19,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441090912] [2021-06-05 13:48:19,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:19,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:19,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:19,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:19,375 INFO L87 Difference]: Start difference. First operand 38023 states and 149689 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:21,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:21,034 INFO L93 Difference]: Finished difference Result 74432 states and 275104 transitions. [2021-06-05 13:48:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 13:48:21,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:21,223 INFO L225 Difference]: With dead ends: 74432 [2021-06-05 13:48:21,223 INFO L226 Difference]: Without dead ends: 74390 [2021-06-05 13:48:21,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 891.5ms TimeCoverageRelationStatistics Valid=1103, Invalid=3727, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:48:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74390 states. [2021-06-05 13:48:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74390 to 35919. [2021-06-05 13:48:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35919 states, 35918 states have (on average 3.9112422740687123) internal successors, (140484), 35918 states have internal predecessors, (140484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35919 states to 35919 states and 140484 transitions. [2021-06-05 13:48:22,529 INFO L78 Accepts]: Start accepts. Automaton has 35919 states and 140484 transitions. Word has length 25 [2021-06-05 13:48:22,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:22,530 INFO L482 AbstractCegarLoop]: Abstraction has 35919 states and 140484 transitions. [2021-06-05 13:48:22,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 35919 states and 140484 transitions. [2021-06-05 13:48:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:22,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:22,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:22,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:22,792 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:22,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1176199720, now seen corresponding path program 81 times [2021-06-05 13:48:22,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:22,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199223119] [2021-06-05 13:48:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:22,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:22,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199223119] [2021-06-05 13:48:22,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199223119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:22,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473110777] [2021-06-05 13:48:22,825 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 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 13:48:22,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:48:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:22,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473110777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:22,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:22,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:22,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489212292] [2021-06-05 13:48:22,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:22,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:22,947 INFO L87 Difference]: Start difference. First operand 35919 states and 140484 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:24,531 INFO L93 Difference]: Finished difference Result 61858 states and 228818 transitions. [2021-06-05 13:48:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:48:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:24,704 INFO L225 Difference]: With dead ends: 61858 [2021-06-05 13:48:24,704 INFO L226 Difference]: Without dead ends: 61830 [2021-06-05 13:48:24,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:48:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61830 states. [2021-06-05 13:48:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61830 to 38738. [2021-06-05 13:48:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38738 states, 38737 states have (on average 3.9098794434261817) internal successors, (151457), 38737 states have internal predecessors, (151457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38738 states to 38738 states and 151457 transitions. [2021-06-05 13:48:25,791 INFO L78 Accepts]: Start accepts. Automaton has 38738 states and 151457 transitions. Word has length 25 [2021-06-05 13:48:25,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:25,791 INFO L482 AbstractCegarLoop]: Abstraction has 38738 states and 151457 transitions. [2021-06-05 13:48:25,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 38738 states and 151457 transitions. [2021-06-05 13:48:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:25,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:25,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:26,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:26,061 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1107955728, now seen corresponding path program 82 times [2021-06-05 13:48:26,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:26,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215625968] [2021-06-05 13:48:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:26,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:26,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215625968] [2021-06-05 13:48:26,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215625968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:26,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490851001] [2021-06-05 13:48:26,092 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 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 13:48:26,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:26,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:26,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:26,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:26,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490851001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:26,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:26,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:26,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360311686] [2021-06-05 13:48:26,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:26,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:26,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:26,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:26,384 INFO L87 Difference]: Start difference. First operand 38738 states and 151457 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:28,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:28,066 INFO L93 Difference]: Finished difference Result 77268 states and 287634 transitions. [2021-06-05 13:48:28,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:48:28,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:28,298 INFO L225 Difference]: With dead ends: 77268 [2021-06-05 13:48:28,299 INFO L226 Difference]: Without dead ends: 77240 [2021-06-05 13:48:28,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1033.1ms TimeCoverageRelationStatistics Valid=961, Invalid=3199, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 13:48:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77240 states. [2021-06-05 13:48:29,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77240 to 45925. [2021-06-05 13:48:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45925 states, 45924 states have (on average 3.9262477136137965) internal successors, (180309), 45924 states have internal predecessors, (180309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45925 states to 45925 states and 180309 transitions. [2021-06-05 13:48:29,713 INFO L78 Accepts]: Start accepts. Automaton has 45925 states and 180309 transitions. Word has length 25 [2021-06-05 13:48:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:29,713 INFO L482 AbstractCegarLoop]: Abstraction has 45925 states and 180309 transitions. [2021-06-05 13:48:29,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 45925 states and 180309 transitions. [2021-06-05 13:48:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:30,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:30,001 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:30,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 13:48:30,217 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1067069608, now seen corresponding path program 83 times [2021-06-05 13:48:30,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:30,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959994135] [2021-06-05 13:48:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:30,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959994135] [2021-06-05 13:48:30,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959994135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102126062] [2021-06-05 13:48:30,245 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 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 13:48:30,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:48:30,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:30,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:30,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:30,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102126062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:30,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:30,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:30,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368469809] [2021-06-05 13:48:30,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:30,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:30,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:30,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:30,356 INFO L87 Difference]: Start difference. First operand 45925 states and 180309 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:31,784 INFO L93 Difference]: Finished difference Result 66048 states and 249082 transitions. [2021-06-05 13:48:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:48:31,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:31,943 INFO L225 Difference]: With dead ends: 66048 [2021-06-05 13:48:31,943 INFO L226 Difference]: Without dead ends: 65996 [2021-06-05 13:48:31,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=733, Invalid=2689, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:48:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65996 states. [2021-06-05 13:48:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65996 to 40933. [2021-06-05 13:48:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40933 states, 40932 states have (on average 3.9125378676829863) internal successors, (160148), 40932 states have internal predecessors, (160148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40933 states to 40933 states and 160148 transitions. [2021-06-05 13:48:33,143 INFO L78 Accepts]: Start accepts. Automaton has 40933 states and 160148 transitions. Word has length 25 [2021-06-05 13:48:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:33,143 INFO L482 AbstractCegarLoop]: Abstraction has 40933 states and 160148 transitions. [2021-06-05 13:48:33,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 40933 states and 160148 transitions. [2021-06-05 13:48:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:33,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:33,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:33,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:33,429 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:33,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1363443692, now seen corresponding path program 84 times [2021-06-05 13:48:33,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:33,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086917910] [2021-06-05 13:48:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:33,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:33,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086917910] [2021-06-05 13:48:33,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086917910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:33,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134265036] [2021-06-05 13:48:33,479 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 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 13:48:33,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:48:33,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:33,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:33,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:33,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134265036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:33,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:33,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:33,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727856251] [2021-06-05 13:48:33,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:33,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:33,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:33,606 INFO L87 Difference]: Start difference. First operand 40933 states and 160148 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:35,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:35,173 INFO L93 Difference]: Finished difference Result 67539 states and 253876 transitions. [2021-06-05 13:48:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:48:35,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:35,362 INFO L225 Difference]: With dead ends: 67539 [2021-06-05 13:48:35,363 INFO L226 Difference]: Without dead ends: 67515 [2021-06-05 13:48:35,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1034.8ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:48:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-06-05 13:48:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 42889. [2021-06-05 13:48:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42889 states, 42888 states have (on average 3.9317524715538146) internal successors, (168625), 42888 states have internal predecessors, (168625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42889 states to 42889 states and 168625 transitions. [2021-06-05 13:48:36,895 INFO L78 Accepts]: Start accepts. Automaton has 42889 states and 168625 transitions. Word has length 25 [2021-06-05 13:48:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:36,895 INFO L482 AbstractCegarLoop]: Abstraction has 42889 states and 168625 transitions. [2021-06-05 13:48:36,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 42889 states and 168625 transitions. [2021-06-05 13:48:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:36,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:36,972 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:37,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:37,173 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:37,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:37,173 INFO L82 PathProgramCache]: Analyzing trace with hash -384886248, now seen corresponding path program 85 times [2021-06-05 13:48:37,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:37,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973575755] [2021-06-05 13:48:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:37,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:37,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973575755] [2021-06-05 13:48:37,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973575755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:37,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999106563] [2021-06-05 13:48:37,211 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 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 13:48:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:37,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:37,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999106563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:37,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:37,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:37,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876005560] [2021-06-05 13:48:37,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:37,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:37,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:37,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:37,327 INFO L87 Difference]: Start difference. First operand 42889 states and 168625 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:38,660 INFO L93 Difference]: Finished difference Result 73498 states and 274895 transitions. [2021-06-05 13:48:38,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:48:38,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:38,868 INFO L225 Difference]: With dead ends: 73498 [2021-06-05 13:48:38,868 INFO L226 Difference]: Without dead ends: 73498 [2021-06-05 13:48:38,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 602.6ms TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:48:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73498 states. [2021-06-05 13:48:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73498 to 42843. [2021-06-05 13:48:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42843 states, 42842 states have (on average 3.928574763082956) internal successors, (168308), 42842 states have internal predecessors, (168308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42843 states to 42843 states and 168308 transitions. [2021-06-05 13:48:40,223 INFO L78 Accepts]: Start accepts. Automaton has 42843 states and 168308 transitions. Word has length 25 [2021-06-05 13:48:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:40,223 INFO L482 AbstractCegarLoop]: Abstraction has 42843 states and 168308 transitions. [2021-06-05 13:48:40,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 42843 states and 168308 transitions. [2021-06-05 13:48:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:40,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:40,295 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:40,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:48:40,495 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:40,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:40,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1231072, now seen corresponding path program 54 times [2021-06-05 13:48:40,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:40,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802937867] [2021-06-05 13:48:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:40,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:40,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802937867] [2021-06-05 13:48:40,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802937867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:40,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775271394] [2021-06-05 13:48:40,537 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 13:48:40,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:48:40,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:40,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:48:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:40,663 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 13:48:40,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775271394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:40,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:40,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:48:40,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780929668] [2021-06-05 13:48:40,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:40,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:40,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:40,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:40,664 INFO L87 Difference]: Start difference. First operand 42843 states and 168308 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:41,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:41,630 INFO L93 Difference]: Finished difference Result 48257 states and 184838 transitions. [2021-06-05 13:48:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:48:41,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:41,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:41,749 INFO L225 Difference]: With dead ends: 48257 [2021-06-05 13:48:41,749 INFO L226 Difference]: Without dead ends: 48257 [2021-06-05 13:48:41,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:48:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48257 states. [2021-06-05 13:48:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48257 to 42793. [2021-06-05 13:48:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42793 states, 42792 states have (on average 3.928608151056272) internal successors, (168113), 42792 states have internal predecessors, (168113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42793 states to 42793 states and 168113 transitions. [2021-06-05 13:48:42,798 INFO L78 Accepts]: Start accepts. Automaton has 42793 states and 168113 transitions. Word has length 25 [2021-06-05 13:48:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:42,798 INFO L482 AbstractCegarLoop]: Abstraction has 42793 states and 168113 transitions. [2021-06-05 13:48:42,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 42793 states and 168113 transitions. [2021-06-05 13:48:42,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:42,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:42,870 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:43,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 13:48:43,070 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:43,070 INFO L82 PathProgramCache]: Analyzing trace with hash -772027368, now seen corresponding path program 55 times [2021-06-05 13:48:43,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:43,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64453266] [2021-06-05 13:48:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:43,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:43,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64453266] [2021-06-05 13:48:43,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64453266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:43,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568328446] [2021-06-05 13:48:43,108 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 13:48:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:43,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:48:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:43,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568328446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:43,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:43,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:48:43,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008552515] [2021-06-05 13:48:43,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:43,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:43,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:43,230 INFO L87 Difference]: Start difference. First operand 42793 states and 168113 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:43,939 INFO L93 Difference]: Finished difference Result 44296 states and 172371 transitions. [2021-06-05 13:48:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 13:48:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:44,266 INFO L225 Difference]: With dead ends: 44296 [2021-06-05 13:48:44,267 INFO L226 Difference]: Without dead ends: 44282 [2021-06-05 13:48:44,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:48:44,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-06-05 13:48:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 43170. [2021-06-05 13:48:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43170 states, 43169 states have (on average 3.922814982973893) internal successors, (169344), 43169 states have internal predecessors, (169344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43170 states to 43170 states and 169344 transitions. [2021-06-05 13:48:45,432 INFO L78 Accepts]: Start accepts. Automaton has 43170 states and 169344 transitions. Word has length 25 [2021-06-05 13:48:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:45,433 INFO L482 AbstractCegarLoop]: Abstraction has 43170 states and 169344 transitions. [2021-06-05 13:48:45,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 43170 states and 169344 transitions. [2021-06-05 13:48:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:45,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:45,510 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:45,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 13:48:45,710 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 332567324, now seen corresponding path program 56 times [2021-06-05 13:48:45,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:45,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77612123] [2021-06-05 13:48:45,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:45,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:45,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77612123] [2021-06-05 13:48:45,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77612123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:45,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209347281] [2021-06-05 13:48:45,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:48:45,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:45,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:45,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:48:45,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:45,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209347281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:45,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:45,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:48:45,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87134070] [2021-06-05 13:48:45,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:48:45,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:45,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:48:45,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:48:45,868 INFO L87 Difference]: Start difference. First operand 43170 states and 169344 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:46,681 INFO L93 Difference]: Finished difference Result 44660 states and 173461 transitions. [2021-06-05 13:48:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 13:48:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:46,791 INFO L225 Difference]: With dead ends: 44660 [2021-06-05 13:48:46,791 INFO L226 Difference]: Without dead ends: 44654 [2021-06-05 13:48:46,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=472, Invalid=1784, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:48:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44654 states. [2021-06-05 13:48:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44654 to 42990. [2021-06-05 13:48:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.9254925678661983) internal successors, (168753), 42989 states have internal predecessors, (168753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168753 transitions. [2021-06-05 13:48:47,744 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168753 transitions. Word has length 25 [2021-06-05 13:48:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:47,745 INFO L482 AbstractCegarLoop]: Abstraction has 42990 states and 168753 transitions. [2021-06-05 13:48:47,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:47,745 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168753 transitions. [2021-06-05 13:48:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:47,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:47,822 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:48,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 13:48:48,037 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:48,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1637832284, now seen corresponding path program 86 times [2021-06-05 13:48:48,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:48,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878591574] [2021-06-05 13:48:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:48,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:48,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878591574] [2021-06-05 13:48:48,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878591574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:48,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238621283] [2021-06-05 13:48:48,069 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 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 13:48:48,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:48:48,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:48,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:48,334 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2021-06-05 13:48:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:48,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238621283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:48,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:48,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:48,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908447601] [2021-06-05 13:48:48,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:48,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:48,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:48,348 INFO L87 Difference]: Start difference. First operand 42990 states and 168753 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:49,531 INFO L93 Difference]: Finished difference Result 60797 states and 230049 transitions. [2021-06-05 13:48:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:48:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:49,696 INFO L225 Difference]: With dead ends: 60797 [2021-06-05 13:48:49,696 INFO L226 Difference]: Without dead ends: 60773 [2021-06-05 13:48:49,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 826.8ms TimeCoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:48:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60773 states. [2021-06-05 13:48:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60773 to 43024. [2021-06-05 13:48:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43024 states, 43023 states have (on average 3.925342258791809) internal successors, (168880), 43023 states have internal predecessors, (168880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43024 states to 43024 states and 168880 transitions. [2021-06-05 13:48:51,187 INFO L78 Accepts]: Start accepts. Automaton has 43024 states and 168880 transitions. Word has length 25 [2021-06-05 13:48:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:51,187 INFO L482 AbstractCegarLoop]: Abstraction has 43024 states and 168880 transitions. [2021-06-05 13:48:51,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 43024 states and 168880 transitions. [2021-06-05 13:48:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:51,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:51,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:51,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 13:48:51,464 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:51,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1355957028, now seen corresponding path program 87 times [2021-06-05 13:48:51,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:51,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633007686] [2021-06-05 13:48:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:51,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633007686] [2021-06-05 13:48:51,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633007686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872516434] [2021-06-05 13:48:51,497 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 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 13:48:51,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:48:51,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:51,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:51,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:51,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872516434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:51,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:51,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:51,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86675500] [2021-06-05 13:48:51,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:51,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:51,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:51,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:51,618 INFO L87 Difference]: Start difference. First operand 43024 states and 168880 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 13:48:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:52,578 INFO L93 Difference]: Finished difference Result 59275 states and 225591 transitions. [2021-06-05 13:48:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:48:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 25 [2021-06-05 13:48:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:52,730 INFO L225 Difference]: With dead ends: 59275 [2021-06-05 13:48:52,730 INFO L226 Difference]: Without dead ends: 59251 [2021-06-05 13:48:52,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 508.9ms TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 13:48:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59251 states. [2021-06-05 13:48:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59251 to 42990. [2021-06-05 13:48:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.925469306101561) internal successors, (168752), 42989 states have internal predecessors, (168752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168752 transitions. [2021-06-05 13:48:54,077 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168752 transitions. Word has length 25 [2021-06-05 13:48:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:54,077 INFO L482 AbstractCegarLoop]: Abstraction has 42990 states and 168752 transitions. [2021-06-05 13:48:54,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 13:48:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168752 transitions. [2021-06-05 13:48:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:54,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:54,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:54,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 13:48:54,352 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:54,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1354335008, now seen corresponding path program 88 times [2021-06-05 13:48:54,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:54,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204987318] [2021-06-05 13:48:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:54,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:54,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204987318] [2021-06-05 13:48:54,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204987318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:54,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770436336] [2021-06-05 13:48:54,384 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 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 13:48:54,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:48:54,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:54,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:54,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770436336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:54,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:54,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:54,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401865384] [2021-06-05 13:48:54,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:54,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:54,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:54,498 INFO L87 Difference]: Start difference. First operand 42990 states and 168752 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:55,585 INFO L93 Difference]: Finished difference Result 75858 states and 282972 transitions. [2021-06-05 13:48:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:48:55,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:56,027 INFO L225 Difference]: With dead ends: 75858 [2021-06-05 13:48:56,027 INFO L226 Difference]: Without dead ends: 75858 [2021-06-05 13:48:56,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=598, Invalid=1852, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 13:48:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75858 states. [2021-06-05 13:48:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75858 to 43007. [2021-06-05 13:48:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43007 states, 43006 states have (on average 3.9260103241408175) internal successors, (168842), 43006 states have internal predecessors, (168842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43007 states to 43007 states and 168842 transitions. [2021-06-05 13:48:57,349 INFO L78 Accepts]: Start accepts. Automaton has 43007 states and 168842 transitions. Word has length 25 [2021-06-05 13:48:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:48:57,349 INFO L482 AbstractCegarLoop]: Abstraction has 43007 states and 168842 transitions. [2021-06-05 13:48:57,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 43007 states and 168842 transitions. [2021-06-05 13:48:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:48:57,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:48:57,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:48:57,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 13:48:57,626 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:48:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:48:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash 820690328, now seen corresponding path program 89 times [2021-06-05 13:48:57,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:48:57,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104091487] [2021-06-05 13:48:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:48:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:48:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:57,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:48:57,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104091487] [2021-06-05 13:48:57,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104091487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:57,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724571862] [2021-06-05 13:48:57,657 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 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 13:48:57,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:48:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:48:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:48:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:48:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:48:57,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724571862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:48:57,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:48:57,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:48:57,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392545136] [2021-06-05 13:48:57,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:48:57,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:48:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:48:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:48:57,771 INFO L87 Difference]: Start difference. First operand 43007 states and 168842 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:48:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:48:59,148 INFO L93 Difference]: Finished difference Result 70213 states and 263905 transitions. [2021-06-05 13:48:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 13:48:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:48:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:48:59,336 INFO L225 Difference]: With dead ends: 70213 [2021-06-05 13:48:59,336 INFO L226 Difference]: Without dead ends: 70191 [2021-06-05 13:48:59,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 578.8ms TimeCoverageRelationStatistics Valid=596, Invalid=1954, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:48:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70191 states. [2021-06-05 13:49:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70191 to 42956. [2021-06-05 13:49:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42956 states, 42955 states have (on average 3.924967989756722) internal successors, (168597), 42955 states have internal predecessors, (168597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42956 states to 42956 states and 168597 transitions. [2021-06-05 13:49:00,553 INFO L78 Accepts]: Start accepts. Automaton has 42956 states and 168597 transitions. Word has length 25 [2021-06-05 13:49:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:00,553 INFO L482 AbstractCegarLoop]: Abstraction has 42956 states and 168597 transitions. [2021-06-05 13:49:00,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 42956 states and 168597 transitions. [2021-06-05 13:49:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:00,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:00,624 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:00,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:00,824 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash -121458378, now seen corresponding path program 90 times [2021-06-05 13:49:00,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:00,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797904361] [2021-06-05 13:49:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:00,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:00,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797904361] [2021-06-05 13:49:00,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797904361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:00,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117926439] [2021-06-05 13:49:00,859 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 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 13:49:00,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:49:00,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:00,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:00,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117926439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:00,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:00,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:49:00,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820632106] [2021-06-05 13:49:00,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:00,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:00,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:00,976 INFO L87 Difference]: Start difference. First operand 42956 states and 168597 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:01,705 INFO L93 Difference]: Finished difference Result 56698 states and 216274 transitions. [2021-06-05 13:49:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:49:01,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:02,135 INFO L225 Difference]: With dead ends: 56698 [2021-06-05 13:49:02,135 INFO L226 Difference]: Without dead ends: 56674 [2021-06-05 13:49:02,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:49:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56674 states. [2021-06-05 13:49:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56674 to 42976. [2021-06-05 13:49:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42976 states, 42975 states have (on average 3.9249098312972657) internal successors, (168673), 42975 states have internal predecessors, (168673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42976 states to 42976 states and 168673 transitions. [2021-06-05 13:49:03,360 INFO L78 Accepts]: Start accepts. Automaton has 42976 states and 168673 transitions. Word has length 25 [2021-06-05 13:49:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:03,360 INFO L482 AbstractCegarLoop]: Abstraction has 42976 states and 168673 transitions. [2021-06-05 13:49:03,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 42976 states and 168673 transitions. [2021-06-05 13:49:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:03,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:03,435 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:03,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:03,636 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:03,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1179719606, now seen corresponding path program 91 times [2021-06-05 13:49:03,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:03,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405057442] [2021-06-05 13:49:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:03,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:03,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405057442] [2021-06-05 13:49:03,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405057442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:03,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141539984] [2021-06-05 13:49:03,670 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 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 13:49:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:03,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:03,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:03,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141539984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:03,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:03,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:49:03,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278031809] [2021-06-05 13:49:03,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:03,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:03,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:03,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:03,783 INFO L87 Difference]: Start difference. First operand 42976 states and 168673 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 13:49:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:04,435 INFO L93 Difference]: Finished difference Result 55282 states and 212006 transitions. [2021-06-05 13:49:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:49:04,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 25 [2021-06-05 13:49:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:04,576 INFO L225 Difference]: With dead ends: 55282 [2021-06-05 13:49:04,576 INFO L226 Difference]: Without dead ends: 55258 [2021-06-05 13:49:04,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:49:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55258 states. [2021-06-05 13:49:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55258 to 42948. [2021-06-05 13:49:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42948 states, 42947 states have (on average 3.9250937201667173) internal successors, (168571), 42947 states have internal predecessors, (168571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42948 states to 42948 states and 168571 transitions. [2021-06-05 13:49:05,693 INFO L78 Accepts]: Start accepts. Automaton has 42948 states and 168571 transitions. Word has length 25 [2021-06-05 13:49:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:05,694 INFO L482 AbstractCegarLoop]: Abstraction has 42948 states and 168571 transitions. [2021-06-05 13:49:05,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 13:49:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 42948 states and 168571 transitions. [2021-06-05 13:49:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:05,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:05,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:05,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:05,962 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:05,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:05,962 INFO L82 PathProgramCache]: Analyzing trace with hash -366696404, now seen corresponding path program 92 times [2021-06-05 13:49:05,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:05,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438217387] [2021-06-05 13:49:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:06,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:06,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438217387] [2021-06-05 13:49:06,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438217387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:06,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353445276] [2021-06-05 13:49:06,001 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 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 13:49:06,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:06,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:06,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:06,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:06,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353445276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:06,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:06,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:49:06,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721039924] [2021-06-05 13:49:06,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:06,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:06,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:06,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:06,138 INFO L87 Difference]: Start difference. First operand 42948 states and 168571 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 13:49:06,369 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-06-05 13:49:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:07,008 INFO L93 Difference]: Finished difference Result 55613 states and 213184 transitions. [2021-06-05 13:49:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:49:07,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 25 [2021-06-05 13:49:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:07,168 INFO L225 Difference]: With dead ends: 55613 [2021-06-05 13:49:07,168 INFO L226 Difference]: Without dead ends: 55585 [2021-06-05 13:49:07,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 557.7ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:49:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55585 states. [2021-06-05 13:49:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55585 to 42946. [2021-06-05 13:49:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 3.9251833740831295) internal successors, (168567), 42945 states have internal predecessors, (168567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 168567 transitions. [2021-06-05 13:49:08,353 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 168567 transitions. Word has length 25 [2021-06-05 13:49:08,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:08,353 INFO L482 AbstractCegarLoop]: Abstraction has 42946 states and 168567 transitions. [2021-06-05 13:49:08,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 13:49:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 168567 transitions. [2021-06-05 13:49:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:08,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:08,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:08,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:08,624 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2130720980, now seen corresponding path program 93 times [2021-06-05 13:49:08,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:08,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358239636] [2021-06-05 13:49:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:08,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:08,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358239636] [2021-06-05 13:49:08,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358239636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:08,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547556610] [2021-06-05 13:49:08,660 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 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 13:49:08,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:49:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:08,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547556610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:08,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:08,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:49:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544478710] [2021-06-05 13:49:08,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:08,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:08,784 INFO L87 Difference]: Start difference. First operand 42946 states and 168567 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:10,226 INFO L93 Difference]: Finished difference Result 74999 states and 282718 transitions. [2021-06-05 13:49:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:49:10,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:10,428 INFO L225 Difference]: With dead ends: 74999 [2021-06-05 13:49:10,429 INFO L226 Difference]: Without dead ends: 74999 [2021-06-05 13:49:10,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:49:10,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74999 states. [2021-06-05 13:49:11,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74999 to 42943. [2021-06-05 13:49:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42943 states, 42942 states have (on average 3.9248521261236085) internal successors, (168541), 42942 states have internal predecessors, (168541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42943 states to 42943 states and 168541 transitions. [2021-06-05 13:49:11,683 INFO L78 Accepts]: Start accepts. Automaton has 42943 states and 168541 transitions. Word has length 25 [2021-06-05 13:49:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:11,683 INFO L482 AbstractCegarLoop]: Abstraction has 42943 states and 168541 transitions. [2021-06-05 13:49:11,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 42943 states and 168541 transitions. [2021-06-05 13:49:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:11,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:11,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:11,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:11,954 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash 44304356, now seen corresponding path program 94 times [2021-06-05 13:49:11,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:11,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418884207] [2021-06-05 13:49:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:11,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:11,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418884207] [2021-06-05 13:49:11,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418884207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:11,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267349566] [2021-06-05 13:49:11,989 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 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 13:49:12,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:12,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:12,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267349566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:12,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:12,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:49:12,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668787305] [2021-06-05 13:49:12,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:12,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:12,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:12,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:12,102 INFO L87 Difference]: Start difference. First operand 42943 states and 168541 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:12,709 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 13:49:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:13,500 INFO L93 Difference]: Finished difference Result 72540 states and 274174 transitions. [2021-06-05 13:49:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 13:49:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:13,689 INFO L225 Difference]: With dead ends: 72540 [2021-06-05 13:49:13,689 INFO L226 Difference]: Without dead ends: 72522 [2021-06-05 13:49:13,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 915.3ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:49:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72522 states. [2021-06-05 13:49:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72522 to 42930. [2021-06-05 13:49:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42930 states, 42929 states have (on average 3.92459642665797) internal successors, (168479), 42929 states have internal predecessors, (168479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42930 states to 42930 states and 168479 transitions. [2021-06-05 13:49:15,001 INFO L78 Accepts]: Start accepts. Automaton has 42930 states and 168479 transitions. Word has length 25 [2021-06-05 13:49:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:15,001 INFO L482 AbstractCegarLoop]: Abstraction has 42930 states and 168479 transitions. [2021-06-05 13:49:15,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 42930 states and 168479 transitions. [2021-06-05 13:49:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:15,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:15,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:15,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:15,277 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1788668362, now seen corresponding path program 95 times [2021-06-05 13:49:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:15,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225219536] [2021-06-05 13:49:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:15,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:15,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225219536] [2021-06-05 13:49:15,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225219536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:15,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745759797] [2021-06-05 13:49:15,314 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 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 13:49:15,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:49:15,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:15,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745759797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:15,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:15,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:49:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526392683] [2021-06-05 13:49:15,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:15,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:15,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:15,427 INFO L87 Difference]: Start difference. First operand 42930 states and 168479 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:16,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:16,600 INFO L93 Difference]: Finished difference Result 59679 states and 226607 transitions. [2021-06-05 13:49:16,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:49:16,600 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:16,758 INFO L225 Difference]: With dead ends: 59679 [2021-06-05 13:49:16,758 INFO L226 Difference]: Without dead ends: 59653 [2021-06-05 13:49:16,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 600.8ms TimeCoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:49:16,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59653 states. [2021-06-05 13:49:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59653 to 42909. [2021-06-05 13:49:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42909 states, 42908 states have (on average 3.9246993567633077) internal successors, (168401), 42908 states have internal predecessors, (168401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42909 states to 42909 states and 168401 transitions. [2021-06-05 13:49:17,897 INFO L78 Accepts]: Start accepts. Automaton has 42909 states and 168401 transitions. Word has length 25 [2021-06-05 13:49:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:17,897 INFO L482 AbstractCegarLoop]: Abstraction has 42909 states and 168401 transitions. [2021-06-05 13:49:17,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 42909 states and 168401 transitions. [2021-06-05 13:49:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:17,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:17,972 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:18,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 13:49:18,173 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1822725736, now seen corresponding path program 96 times [2021-06-05 13:49:18,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:18,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775647361] [2021-06-05 13:49:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:18,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775647361] [2021-06-05 13:49:18,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775647361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408774698] [2021-06-05 13:49:18,205 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 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 13:49:18,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:49:18,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:18,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:18,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408774698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:18,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:18,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:49:18,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937881459] [2021-06-05 13:49:18,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:49:18,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:18,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:49:18,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:49:18,321 INFO L87 Difference]: Start difference. First operand 42909 states and 168401 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:19,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:19,822 INFO L93 Difference]: Finished difference Result 70768 states and 265935 transitions. [2021-06-05 13:49:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 13:49:19,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:20,010 INFO L225 Difference]: With dead ends: 70768 [2021-06-05 13:49:20,010 INFO L226 Difference]: Without dead ends: 70747 [2021-06-05 13:49:20,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 949.0ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 13:49:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70747 states. [2021-06-05 13:49:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70747 to 46142. [2021-06-05 13:49:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46142 states, 46141 states have (on average 3.9316226349667325) internal successors, (181409), 46141 states have internal predecessors, (181409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46142 states to 46142 states and 181409 transitions. [2021-06-05 13:49:21,352 INFO L78 Accepts]: Start accepts. Automaton has 46142 states and 181409 transitions. Word has length 25 [2021-06-05 13:49:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:21,352 INFO L482 AbstractCegarLoop]: Abstraction has 46142 states and 181409 transitions. [2021-06-05 13:49:21,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 46142 states and 181409 transitions. [2021-06-05 13:49:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:21,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:21,427 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:21,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:21,628 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:21,628 INFO L82 PathProgramCache]: Analyzing trace with hash -547677804, now seen corresponding path program 97 times [2021-06-05 13:49:21,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:21,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500030828] [2021-06-05 13:49:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:21,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:21,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500030828] [2021-06-05 13:49:21,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500030828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:21,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386736857] [2021-06-05 13:49:21,669 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 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 13:49:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:21,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:21,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386736857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:21,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:21,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:49:21,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413958887] [2021-06-05 13:49:21,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:21,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:21,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:21,787 INFO L87 Difference]: Start difference. First operand 46142 states and 181409 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:22,201 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-06-05 13:49:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:23,269 INFO L93 Difference]: Finished difference Result 70061 states and 263721 transitions. [2021-06-05 13:49:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:49:23,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:23,451 INFO L225 Difference]: With dead ends: 70061 [2021-06-05 13:49:23,452 INFO L226 Difference]: Without dead ends: 70061 [2021-06-05 13:49:23,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1002.5ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:49:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70061 states. [2021-06-05 13:49:24,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70061 to 46133. [2021-06-05 13:49:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46133 states, 46132 states have (on average 3.931414202722622) internal successors, (181364), 46132 states have internal predecessors, (181364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46133 states to 46133 states and 181364 transitions. [2021-06-05 13:49:24,795 INFO L78 Accepts]: Start accepts. Automaton has 46133 states and 181364 transitions. Word has length 25 [2021-06-05 13:49:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:24,795 INFO L482 AbstractCegarLoop]: Abstraction has 46133 states and 181364 transitions. [2021-06-05 13:49:24,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 46133 states and 181364 transitions. [2021-06-05 13:49:24,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:24,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:24,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:25,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 13:49:25,081 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:25,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:25,081 INFO L82 PathProgramCache]: Analyzing trace with hash -61873700, now seen corresponding path program 98 times [2021-06-05 13:49:25,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:25,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701944390] [2021-06-05 13:49:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:25,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:25,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701944390] [2021-06-05 13:49:25,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701944390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:25,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434170838] [2021-06-05 13:49:25,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:49:25,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:25,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:25,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:25,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434170838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:25,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:25,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:49:25,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649739263] [2021-06-05 13:49:25,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:25,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:25,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:25,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:25,490 INFO L87 Difference]: Start difference. First operand 46133 states and 181364 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 13:49:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:26,747 INFO L93 Difference]: Finished difference Result 66793 states and 252387 transitions. [2021-06-05 13:49:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 13:49:26,747 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 25 [2021-06-05 13:49:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:26,931 INFO L225 Difference]: With dead ends: 66793 [2021-06-05 13:49:26,931 INFO L226 Difference]: Without dead ends: 66779 [2021-06-05 13:49:26,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 749.4ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:49:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66779 states. [2021-06-05 13:49:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66779 to 46121. [2021-06-05 13:49:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46121 states, 46120 states have (on average 3.9313313096270597) internal successors, (181313), 46120 states have internal predecessors, (181313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46121 states to 46121 states and 181313 transitions. [2021-06-05 13:49:28,209 INFO L78 Accepts]: Start accepts. Automaton has 46121 states and 181313 transitions. Word has length 25 [2021-06-05 13:49:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:28,209 INFO L482 AbstractCegarLoop]: Abstraction has 46121 states and 181313 transitions. [2021-06-05 13:49:28,209 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 13:49:28,209 INFO L276 IsEmpty]: Start isEmpty. Operand 46121 states and 181313 transitions. [2021-06-05 13:49:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:28,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:28,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:28,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:28,644 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:28,644 INFO L82 PathProgramCache]: Analyzing trace with hash -698340554, now seen corresponding path program 99 times [2021-06-05 13:49:28,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:28,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226425418] [2021-06-05 13:49:28,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:28,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:28,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226425418] [2021-06-05 13:49:28,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226425418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:28,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431499804] [2021-06-05 13:49:28,689 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 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 13:49:28,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:49:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:28,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:49:28,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:28,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431499804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:28,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:28,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:49:28,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576129251] [2021-06-05 13:49:28,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:28,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:28,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:28,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:28,803 INFO L87 Difference]: Start difference. First operand 46121 states and 181313 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 13:49:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:29,783 INFO L93 Difference]: Finished difference Result 61745 states and 236680 transitions. [2021-06-05 13:49:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:49:29,783 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 25 [2021-06-05 13:49:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:29,949 INFO L225 Difference]: With dead ends: 61745 [2021-06-05 13:49:29,949 INFO L226 Difference]: Without dead ends: 61721 [2021-06-05 13:49:29,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:49:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61721 states. [2021-06-05 13:49:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61721 to 46081. [2021-06-05 13:49:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46081 states, 46080 states have (on average 3.931640625) internal successors, (181170), 46080 states have internal predecessors, (181170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46081 states to 46081 states and 181170 transitions. [2021-06-05 13:49:31,115 INFO L78 Accepts]: Start accepts. Automaton has 46081 states and 181170 transitions. Word has length 25 [2021-06-05 13:49:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:31,115 INFO L482 AbstractCegarLoop]: Abstraction has 46081 states and 181170 transitions. [2021-06-05 13:49:31,115 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 13:49:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 46081 states and 181170 transitions. [2021-06-05 13:49:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:31,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:31,191 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:31,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:31,392 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:31,392 INFO L82 PathProgramCache]: Analyzing trace with hash -901130092, now seen corresponding path program 57 times [2021-06-05 13:49:31,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:31,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23315602] [2021-06-05 13:49:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:31,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:31,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23315602] [2021-06-05 13:49:31,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23315602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:31,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792788013] [2021-06-05 13:49:31,429 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 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 13:49:31,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:49:31,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:31,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:49:31,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:31,681 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 13:49:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:31,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792788013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:31,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:31,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:49:31,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096183601] [2021-06-05 13:49:31,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:49:31,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:49:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:49:31,729 INFO L87 Difference]: Start difference. First operand 46081 states and 181170 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:32,280 INFO L93 Difference]: Finished difference Result 47008 states and 183685 transitions. [2021-06-05 13:49:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:49:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:32,395 INFO L225 Difference]: With dead ends: 47008 [2021-06-05 13:49:32,395 INFO L226 Difference]: Without dead ends: 47001 [2021-06-05 13:49:32,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 442.3ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:49:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47001 states. [2021-06-05 13:49:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47001 to 46162. [2021-06-05 13:49:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46162 states, 46161 states have (on average 3.9308507181386885) internal successors, (181452), 46161 states have internal predecessors, (181452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46162 states to 46162 states and 181452 transitions. [2021-06-05 13:49:33,423 INFO L78 Accepts]: Start accepts. Automaton has 46162 states and 181452 transitions. Word has length 25 [2021-06-05 13:49:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:33,423 INFO L482 AbstractCegarLoop]: Abstraction has 46162 states and 181452 transitions. [2021-06-05 13:49:33,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 46162 states and 181452 transitions. [2021-06-05 13:49:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:33,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:33,504 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:33,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 13:49:33,705 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:33,705 INFO L82 PathProgramCache]: Analyzing trace with hash 203464600, now seen corresponding path program 58 times [2021-06-05 13:49:33,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:33,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340974627] [2021-06-05 13:49:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:33,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:33,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340974627] [2021-06-05 13:49:33,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340974627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:33,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480614668] [2021-06-05 13:49:33,743 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 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 13:49:33,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:33,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:49:33,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:33,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480614668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:33,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:33,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:49:33,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271973962] [2021-06-05 13:49:33,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:49:33,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:49:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:49:33,867 INFO L87 Difference]: Start difference. First operand 46162 states and 181452 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:34,467 INFO L93 Difference]: Finished difference Result 47173 states and 184209 transitions. [2021-06-05 13:49:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:49:34,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:34,593 INFO L225 Difference]: With dead ends: 47173 [2021-06-05 13:49:34,593 INFO L226 Difference]: Without dead ends: 47173 [2021-06-05 13:49:34,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:49:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47173 states. [2021-06-05 13:49:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47173 to 46027. [2021-06-05 13:49:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46027 states, 46026 states have (on average 3.932733672272194) internal successors, (181008), 46026 states have internal predecessors, (181008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46027 states to 46027 states and 181008 transitions. [2021-06-05 13:49:35,698 INFO L78 Accepts]: Start accepts. Automaton has 46027 states and 181008 transitions. Word has length 25 [2021-06-05 13:49:35,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:35,698 INFO L482 AbstractCegarLoop]: Abstraction has 46027 states and 181008 transitions. [2021-06-05 13:49:35,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 46027 states and 181008 transitions. [2021-06-05 13:49:36,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:36,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:36,050 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:36,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:36,260 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash 118243368, now seen corresponding path program 16 times [2021-06-05 13:49:36,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:36,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54729220] [2021-06-05 13:49:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:36,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:36,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54729220] [2021-06-05 13:49:36,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54729220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:36,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813418813] [2021-06-05 13:49:36,294 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 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 13:49:36,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:49:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:36,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813418813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:36,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:36,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:49:36,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886906050] [2021-06-05 13:49:36,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:49:36,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:36,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:49:36,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:49:36,420 INFO L87 Difference]: Start difference. First operand 46027 states and 181008 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:37,232 INFO L93 Difference]: Finished difference Result 46443 states and 182086 transitions. [2021-06-05 13:49:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:49:37,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:37,359 INFO L225 Difference]: With dead ends: 46443 [2021-06-05 13:49:37,360 INFO L226 Difference]: Without dead ends: 46443 [2021-06-05 13:49:37,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 425.8ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:49:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46443 states. [2021-06-05 13:49:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46443 to 46095. [2021-06-05 13:49:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46095 states, 46094 states have (on average 3.9314878292185536) internal successors, (181218), 46094 states have internal predecessors, (181218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46095 states to 46095 states and 181218 transitions. [2021-06-05 13:49:38,405 INFO L78 Accepts]: Start accepts. Automaton has 46095 states and 181218 transitions. Word has length 25 [2021-06-05 13:49:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:38,406 INFO L482 AbstractCegarLoop]: Abstraction has 46095 states and 181218 transitions. [2021-06-05 13:49:38,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 46095 states and 181218 transitions. [2021-06-05 13:49:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:38,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:38,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:38,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:38,688 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1002298468, now seen corresponding path program 17 times [2021-06-05 13:49:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:38,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107376860] [2021-06-05 13:49:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:38,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:38,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107376860] [2021-06-05 13:49:38,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107376860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:38,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501463836] [2021-06-05 13:49:38,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:49:38,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:49:38,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:38,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:49:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:38,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501463836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:38,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:38,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:49:38,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984334641] [2021-06-05 13:49:38,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:49:38,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:38,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:49:38,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:49:38,782 INFO L87 Difference]: Start difference. First operand 46095 states and 181218 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:39,251 INFO L93 Difference]: Finished difference Result 73392 states and 283504 transitions. [2021-06-05 13:49:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:49:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:39,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:39,835 INFO L225 Difference]: With dead ends: 73392 [2021-06-05 13:49:39,836 INFO L226 Difference]: Without dead ends: 73366 [2021-06-05 13:49:39,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:49:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73366 states. [2021-06-05 13:49:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73366 to 61230. [2021-06-05 13:49:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61230 states, 61229 states have (on average 3.9815446928742917) internal successors, (243786), 61229 states have internal predecessors, (243786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61230 states to 61230 states and 243786 transitions. [2021-06-05 13:49:41,412 INFO L78 Accepts]: Start accepts. Automaton has 61230 states and 243786 transitions. Word has length 25 [2021-06-05 13:49:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:41,412 INFO L482 AbstractCegarLoop]: Abstraction has 61230 states and 243786 transitions. [2021-06-05 13:49:41,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 61230 states and 243786 transitions. [2021-06-05 13:49:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:41,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:41,525 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:41,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:41,725 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:41,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:41,726 INFO L82 PathProgramCache]: Analyzing trace with hash -170939552, now seen corresponding path program 18 times [2021-06-05 13:49:41,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:41,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25810622] [2021-06-05 13:49:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:41,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25810622] [2021-06-05 13:49:41,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25810622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779079871] [2021-06-05 13:49:41,753 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 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 13:49:41,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:49:41,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:49:41,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:41,885 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 13:49:41,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779079871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:41,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:41,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:49:41,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774175212] [2021-06-05 13:49:41,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:41,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:41,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:41,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:41,886 INFO L87 Difference]: Start difference. First operand 61230 states and 243786 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:43,030 INFO L93 Difference]: Finished difference Result 62484 states and 247025 transitions. [2021-06-05 13:49:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:49:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:43,207 INFO L225 Difference]: With dead ends: 62484 [2021-06-05 13:49:43,207 INFO L226 Difference]: Without dead ends: 62484 [2021-06-05 13:49:43,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:49:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62484 states. [2021-06-05 13:49:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62484 to 61380. [2021-06-05 13:49:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61380 states, 61379 states have (on average 3.9795858518385767) internal successors, (244263), 61379 states have internal predecessors, (244263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61380 states to 61380 states and 244263 transitions. [2021-06-05 13:49:44,691 INFO L78 Accepts]: Start accepts. Automaton has 61380 states and 244263 transitions. Word has length 25 [2021-06-05 13:49:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:44,691 INFO L482 AbstractCegarLoop]: Abstraction has 61380 states and 244263 transitions. [2021-06-05 13:49:44,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 61380 states and 244263 transitions. [2021-06-05 13:49:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:44,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:44,805 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:45,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:45,005 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:45,005 INFO L82 PathProgramCache]: Analyzing trace with hash -604049820, now seen corresponding path program 19 times [2021-06-05 13:49:45,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:45,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840614273] [2021-06-05 13:49:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:45,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:45,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840614273] [2021-06-05 13:49:45,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840614273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:45,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530171444] [2021-06-05 13:49:45,030 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 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 13:49:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:49:45,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:45,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530171444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:45,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:45,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:49:45,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708317113] [2021-06-05 13:49:45,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:49:45,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:45,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:49:45,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:49:45,110 INFO L87 Difference]: Start difference. First operand 61380 states and 244263 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:45,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:45,631 INFO L93 Difference]: Finished difference Result 82749 states and 315087 transitions. [2021-06-05 13:49:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:49:45,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:46,196 INFO L225 Difference]: With dead ends: 82749 [2021-06-05 13:49:46,196 INFO L226 Difference]: Without dead ends: 82749 [2021-06-05 13:49:46,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:49:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82749 states. [2021-06-05 13:49:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82749 to 59640. [2021-06-05 13:49:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970220828652392) internal successors, (236780), 59639 states have internal predecessors, (236780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236780 transitions. [2021-06-05 13:49:47,722 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236780 transitions. Word has length 25 [2021-06-05 13:49:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:47,722 INFO L482 AbstractCegarLoop]: Abstraction has 59640 states and 236780 transitions. [2021-06-05 13:49:47,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236780 transitions. [2021-06-05 13:49:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:47,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:47,831 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:48,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:48,032 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash -297815200, now seen corresponding path program 20 times [2021-06-05 13:49:48,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:48,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025128482] [2021-06-05 13:49:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:48,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:48,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025128482] [2021-06-05 13:49:48,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025128482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:48,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781722289] [2021-06-05 13:49:48,061 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 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 13:49:48,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:49:48,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:49:48,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:48,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781722289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:48,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:48,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:49:48,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962189974] [2021-06-05 13:49:48,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:48,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:48,213 INFO L87 Difference]: Start difference. First operand 59640 states and 236780 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:49,268 INFO L93 Difference]: Finished difference Result 60378 states and 238589 transitions. [2021-06-05 13:49:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:49:49,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:49,460 INFO L225 Difference]: With dead ends: 60378 [2021-06-05 13:49:49,460 INFO L226 Difference]: Without dead ends: 60371 [2021-06-05 13:49:49,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:49:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60371 states. [2021-06-05 13:49:50,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60371 to 59640. [2021-06-05 13:49:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970187293549523) internal successors, (236778), 59639 states have internal predecessors, (236778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236778 transitions. [2021-06-05 13:49:50,849 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236778 transitions. Word has length 25 [2021-06-05 13:49:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:50,849 INFO L482 AbstractCegarLoop]: Abstraction has 59640 states and 236778 transitions. [2021-06-05 13:49:50,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236778 transitions. [2021-06-05 13:49:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:50,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:50,959 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:51,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:49:51,159 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2110520852, now seen corresponding path program 21 times [2021-06-05 13:49:51,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:51,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899985733] [2021-06-05 13:49:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:51,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:51,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899985733] [2021-06-05 13:49:51,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899985733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:51,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738421670] [2021-06-05 13:49:51,187 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 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 13:49:51,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:49:51,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:49:51,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:51,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738421670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:51,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:51,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:49:51,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774644135] [2021-06-05 13:49:51,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:49:51,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:51,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:49:51,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:49:51,313 INFO L87 Difference]: Start difference. First operand 59640 states and 236778 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:52,232 INFO L93 Difference]: Finished difference Result 61587 states and 241992 transitions. [2021-06-05 13:49:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:49:52,232 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:52,702 INFO L225 Difference]: With dead ends: 61587 [2021-06-05 13:49:52,702 INFO L226 Difference]: Without dead ends: 61587 [2021-06-05 13:49:52,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:49:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61587 states. [2021-06-05 13:49:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61587 to 59994. [2021-06-05 13:49:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59994 states, 59993 states have (on average 3.9657460037004317) internal successors, (237917), 59993 states have internal predecessors, (237917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59994 states to 59994 states and 237917 transitions. [2021-06-05 13:49:54,104 INFO L78 Accepts]: Start accepts. Automaton has 59994 states and 237917 transitions. Word has length 25 [2021-06-05 13:49:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:54,105 INFO L482 AbstractCegarLoop]: Abstraction has 59994 states and 237917 transitions. [2021-06-05 13:49:54,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 59994 states and 237917 transitions. [2021-06-05 13:49:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:54,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:54,223 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:54,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 13:49:54,423 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:54,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:54,423 INFO L82 PathProgramCache]: Analyzing trace with hash 698853140, now seen corresponding path program 22 times [2021-06-05 13:49:54,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:54,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389002543] [2021-06-05 13:49:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:49:54,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:54,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389002543] [2021-06-05 13:49:54,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389002543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:54,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994636025] [2021-06-05 13:49:54,447 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 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 13:49:54,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:49:54,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:49:54,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:49:54,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994636025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:54,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:54,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 13:49:54,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669080478] [2021-06-05 13:49:54,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:49:54,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:54,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:49:54,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:49:54,517 INFO L87 Difference]: Start difference. First operand 59994 states and 237917 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 13:49:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:55,027 INFO L93 Difference]: Finished difference Result 81683 states and 316037 transitions. [2021-06-05 13:49:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:49:55,028 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 25 [2021-06-05 13:49:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:55,265 INFO L225 Difference]: With dead ends: 81683 [2021-06-05 13:49:55,265 INFO L226 Difference]: Without dead ends: 81677 [2021-06-05 13:49:55,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:49:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81677 states. [2021-06-05 13:49:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81677 to 66665. [2021-06-05 13:49:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66665 states, 66664 states have (on average 3.9792541701668065) internal successors, (265273), 66664 states have internal predecessors, (265273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66665 states to 66665 states and 265273 transitions. [2021-06-05 13:49:57,259 INFO L78 Accepts]: Start accepts. Automaton has 66665 states and 265273 transitions. Word has length 25 [2021-06-05 13:49:57,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:49:57,259 INFO L482 AbstractCegarLoop]: Abstraction has 66665 states and 265273 transitions. [2021-06-05 13:49:57,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 13:49:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 66665 states and 265273 transitions. [2021-06-05 13:49:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:49:57,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:49:57,380 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:49:57,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 13:49:57,585 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:49:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:49:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1677410584, now seen corresponding path program 23 times [2021-06-05 13:49:57,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:49:57,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146863710] [2021-06-05 13:49:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:49:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:49:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:49:57,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:49:57,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146863710] [2021-06-05 13:49:57,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146863710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:57,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796570386] [2021-06-05 13:49:57,605 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 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 13:49:57,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:49:57,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:49:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:49:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:49:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:49:57,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796570386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:49:57,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:49:57,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:49:57,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797944983] [2021-06-05 13:49:57,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:49:57,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:49:57,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:49:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:49:57,703 INFO L87 Difference]: Start difference. First operand 66665 states and 265273 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:49:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:49:58,607 INFO L93 Difference]: Finished difference Result 88628 states and 338516 transitions. [2021-06-05 13:49:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:49:58,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:49:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:49:58,954 INFO L225 Difference]: With dead ends: 88628 [2021-06-05 13:49:58,954 INFO L226 Difference]: Without dead ends: 88621 [2021-06-05 13:49:58,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:49:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88621 states. [2021-06-05 13:50:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88621 to 65399. [2021-06-05 13:50:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65399 states, 65398 states have (on average 3.972644423376862) internal successors, (259803), 65398 states have internal predecessors, (259803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65399 states to 65399 states and 259803 transitions. [2021-06-05 13:50:00,681 INFO L78 Accepts]: Start accepts. Automaton has 65399 states and 259803 transitions. Word has length 25 [2021-06-05 13:50:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:00,681 INFO L482 AbstractCegarLoop]: Abstraction has 65399 states and 259803 transitions. [2021-06-05 13:50:00,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 65399 states and 259803 transitions. [2021-06-05 13:50:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:00,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:00,797 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:01,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 13:50:01,001 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:01,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1983645204, now seen corresponding path program 24 times [2021-06-05 13:50:01,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:01,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593164786] [2021-06-05 13:50:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:50:01,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:01,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593164786] [2021-06-05 13:50:01,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593164786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:01,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232622024] [2021-06-05 13:50:01,039 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 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 13:50:01,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:50:01,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:01,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:50:01,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:01,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232622024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:01,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:01,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:50:01,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851647464] [2021-06-05 13:50:01,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:01,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:01,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:01,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:01,165 INFO L87 Difference]: Start difference. First operand 65399 states and 259803 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:02,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:02,339 INFO L93 Difference]: Finished difference Result 66631 states and 262831 transitions. [2021-06-05 13:50:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 13:50:02,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:02,539 INFO L225 Difference]: With dead ends: 66631 [2021-06-05 13:50:02,540 INFO L226 Difference]: Without dead ends: 66610 [2021-06-05 13:50:02,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 431.1ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:50:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66610 states. [2021-06-05 13:50:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66610 to 65301. [2021-06-05 13:50:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65301 states, 65300 states have (on average 3.9736600306278715) internal successors, (259480), 65300 states have internal predecessors, (259480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65301 states to 65301 states and 259480 transitions. [2021-06-05 13:50:04,163 INFO L78 Accepts]: Start accepts. Automaton has 65301 states and 259480 transitions. Word has length 25 [2021-06-05 13:50:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:04,163 INFO L482 AbstractCegarLoop]: Abstraction has 65301 states and 259480 transitions. [2021-06-05 13:50:04,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 65301 states and 259480 transitions. [2021-06-05 13:50:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:04,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:04,298 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:04,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:04,514 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -403061012, now seen corresponding path program 25 times [2021-06-05 13:50:04,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:04,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439169857] [2021-06-05 13:50:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:04,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:04,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439169857] [2021-06-05 13:50:04,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439169857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:04,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036500351] [2021-06-05 13:50:04,539 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 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 13:50:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:50:04,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036500351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:04,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:04,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 13:50:04,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151105119] [2021-06-05 13:50:04,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:50:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:04,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:50:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:50:04,634 INFO L87 Difference]: Start difference. First operand 65301 states and 259480 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:05,656 INFO L93 Difference]: Finished difference Result 88604 states and 339078 transitions. [2021-06-05 13:50:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:50:05,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:05,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:05,914 INFO L225 Difference]: With dead ends: 88604 [2021-06-05 13:50:05,914 INFO L226 Difference]: Without dead ends: 88597 [2021-06-05 13:50:05,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:50:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88597 states. [2021-06-05 13:50:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88597 to 66336. [2021-06-05 13:50:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66336 states, 66335 states have (on average 3.9726690284163713) internal successors, (263527), 66335 states have internal predecessors, (263527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66336 states to 66336 states and 263527 transitions. [2021-06-05 13:50:07,847 INFO L78 Accepts]: Start accepts. Automaton has 66336 states and 263527 transitions. Word has length 25 [2021-06-05 13:50:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:07,847 INFO L482 AbstractCegarLoop]: Abstraction has 66336 states and 263527 transitions. [2021-06-05 13:50:07,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 66336 states and 263527 transitions. [2021-06-05 13:50:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:08,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:08,320 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:08,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:08,533 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash 147370776, now seen corresponding path program 26 times [2021-06-05 13:50:08,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:08,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851368378] [2021-06-05 13:50:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:08,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:08,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851368378] [2021-06-05 13:50:08,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851368378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:08,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183666727] [2021-06-05 13:50:08,566 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 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 13:50:08,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:08,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:08,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:50:08,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:08,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183666727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:08,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:08,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:50:08,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740799645] [2021-06-05 13:50:08,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:08,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:08,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:08,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:08,706 INFO L87 Difference]: Start difference. First operand 66336 states and 263527 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:09,584 INFO L93 Difference]: Finished difference Result 67438 states and 266327 transitions. [2021-06-05 13:50:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:50:09,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:09,795 INFO L225 Difference]: With dead ends: 67438 [2021-06-05 13:50:09,795 INFO L226 Difference]: Without dead ends: 67396 [2021-06-05 13:50:09,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:50:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67396 states. [2021-06-05 13:50:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67396 to 66394. [2021-06-05 13:50:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66394 states, 66393 states have (on average 3.972045245733737) internal successors, (263716), 66393 states have internal predecessors, (263716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66394 states to 66394 states and 263716 transitions. [2021-06-05 13:50:11,746 INFO L78 Accepts]: Start accepts. Automaton has 66394 states and 263716 transitions. Word has length 25 [2021-06-05 13:50:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:11,746 INFO L482 AbstractCegarLoop]: Abstraction has 66394 states and 263716 transitions. [2021-06-05 13:50:11,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 66394 states and 263716 transitions. [2021-06-05 13:50:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:11,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:11,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:12,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 13:50:12,089 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -329451636, now seen corresponding path program 27 times [2021-06-05 13:50:12,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:12,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834768569] [2021-06-05 13:50:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:12,140 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 13:50:12,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834768569] [2021-06-05 13:50:12,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834768569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:12,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877043017] [2021-06-05 13:50:12,141 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 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 13:50:12,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:50:12,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:50:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:12,277 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 13:50:12,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877043017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:12,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:12,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:50:12,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80564262] [2021-06-05 13:50:12,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:12,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:12,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:12,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:12,278 INFO L87 Difference]: Start difference. First operand 66394 states and 263716 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:13,307 INFO L93 Difference]: Finished difference Result 67779 states and 267269 transitions. [2021-06-05 13:50:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:50:13,317 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:13,536 INFO L225 Difference]: With dead ends: 67779 [2021-06-05 13:50:13,537 INFO L226 Difference]: Without dead ends: 67779 [2021-06-05 13:50:13,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 534.1ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:50:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67779 states. [2021-06-05 13:50:15,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67779 to 66296. [2021-06-05 13:50:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66296 states, 66295 states have (on average 3.9728335470246625) internal successors, (263379), 66295 states have internal predecessors, (263379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66296 states to 66296 states and 263379 transitions. [2021-06-05 13:50:15,430 INFO L78 Accepts]: Start accepts. Automaton has 66296 states and 263379 transitions. Word has length 25 [2021-06-05 13:50:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:15,430 INFO L482 AbstractCegarLoop]: Abstraction has 66296 states and 263379 transitions. [2021-06-05 13:50:15,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 66296 states and 263379 transitions. [2021-06-05 13:50:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:15,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:15,557 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:15,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:15,772 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash 267542668, now seen corresponding path program 28 times [2021-06-05 13:50:15,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:15,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085476627] [2021-06-05 13:50:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:15,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:15,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085476627] [2021-06-05 13:50:15,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085476627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:15,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703403148] [2021-06-05 13:50:15,798 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 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 13:50:15,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:15,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:15,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:50:15,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703403148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:15,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:15,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 13:50:15,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883173589] [2021-06-05 13:50:15,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:50:15,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:15,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:50:15,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:50:15,869 INFO L87 Difference]: Start difference. First operand 66296 states and 263379 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:16,376 INFO L93 Difference]: Finished difference Result 77336 states and 298514 transitions. [2021-06-05 13:50:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:50:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:16,614 INFO L225 Difference]: With dead ends: 77336 [2021-06-05 13:50:16,614 INFO L226 Difference]: Without dead ends: 77318 [2021-06-05 13:50:16,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:50:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77318 states. [2021-06-05 13:50:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77318 to 66229. [2021-06-05 13:50:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66229 states, 66228 states have (on average 3.9722473878118016) internal successors, (263074), 66228 states have internal predecessors, (263074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66229 states to 66229 states and 263074 transitions. [2021-06-05 13:50:18,565 INFO L78 Accepts]: Start accepts. Automaton has 66229 states and 263074 transitions. Word has length 25 [2021-06-05 13:50:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:18,566 INFO L482 AbstractCegarLoop]: Abstraction has 66229 states and 263074 transitions. [2021-06-05 13:50:18,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 66229 states and 263074 transitions. [2021-06-05 13:50:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:18,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:18,694 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:18,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-06-05 13:50:18,895 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:18,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1076367576, now seen corresponding path program 29 times [2021-06-05 13:50:18,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:18,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739873055] [2021-06-05 13:50:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:50:18,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:18,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739873055] [2021-06-05 13:50:18,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739873055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:18,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093953841] [2021-06-05 13:50:18,916 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 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 13:50:18,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:50:18,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:18,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:18,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:50:19,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093953841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:19,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:19,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:50:19,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498735945] [2021-06-05 13:50:19,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:50:19,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:19,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:50:19,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:50:19,003 INFO L87 Difference]: Start difference. First operand 66229 states and 263074 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:19,542 INFO L93 Difference]: Finished difference Result 79945 states and 311462 transitions. [2021-06-05 13:50:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:50:19,542 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:19,777 INFO L225 Difference]: With dead ends: 79945 [2021-06-05 13:50:19,777 INFO L226 Difference]: Without dead ends: 79938 [2021-06-05 13:50:19,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:50:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79938 states. [2021-06-05 13:50:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79938 to 70553. [2021-06-05 13:50:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70553 states, 70552 states have (on average 3.97304116112938) internal successors, (280306), 70552 states have internal predecessors, (280306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70553 states to 70553 states and 280306 transitions. [2021-06-05 13:50:21,720 INFO L78 Accepts]: Start accepts. Automaton has 70553 states and 280306 transitions. Word has length 25 [2021-06-05 13:50:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:21,721 INFO L482 AbstractCegarLoop]: Abstraction has 70553 states and 280306 transitions. [2021-06-05 13:50:21,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 70553 states and 280306 transitions. [2021-06-05 13:50:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:21,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:21,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:22,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:22,047 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash -525935788, now seen corresponding path program 30 times [2021-06-05 13:50:22,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:22,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058735243] [2021-06-05 13:50:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:50:22,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:22,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058735243] [2021-06-05 13:50:22,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058735243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96338632] [2021-06-05 13:50:22,079 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 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 13:50:22,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:50:22,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:50:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:22,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96338632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:22,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:22,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:50:22,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431496903] [2021-06-05 13:50:22,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:22,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:22,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:22,233 INFO L87 Difference]: Start difference. First operand 70553 states and 280306 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:23,317 INFO L93 Difference]: Finished difference Result 72588 states and 285810 transitions. [2021-06-05 13:50:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:50:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:23,544 INFO L225 Difference]: With dead ends: 72588 [2021-06-05 13:50:23,545 INFO L226 Difference]: Without dead ends: 72546 [2021-06-05 13:50:23,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:50:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72546 states. [2021-06-05 13:50:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72546 to 70799. [2021-06-05 13:50:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70799 states, 70798 states have (on average 3.969787282126614) internal successors, (281053), 70798 states have internal predecessors, (281053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70799 states to 70799 states and 281053 transitions. [2021-06-05 13:50:25,337 INFO L78 Accepts]: Start accepts. Automaton has 70799 states and 281053 transitions. Word has length 25 [2021-06-05 13:50:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:25,338 INFO L482 AbstractCegarLoop]: Abstraction has 70799 states and 281053 transitions. [2021-06-05 13:50:25,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 70799 states and 281053 transitions. [2021-06-05 13:50:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:25,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:25,470 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:25,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:25,670 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash 130107116, now seen corresponding path program 31 times [2021-06-05 13:50:25,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:25,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696147190] [2021-06-05 13:50:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:25,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:25,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696147190] [2021-06-05 13:50:25,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696147190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:25,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658991142] [2021-06-05 13:50:25,714 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 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 13:50:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:25,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:50:25,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:25,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658991142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:25,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:25,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:50:25,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389722279] [2021-06-05 13:50:25,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:50:25,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:25,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:50:25,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:50:25,817 INFO L87 Difference]: Start difference. First operand 70799 states and 281053 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:26,733 INFO L93 Difference]: Finished difference Result 78286 states and 305005 transitions. [2021-06-05 13:50:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:50:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:26,947 INFO L225 Difference]: With dead ends: 78286 [2021-06-05 13:50:26,947 INFO L226 Difference]: Without dead ends: 78279 [2021-06-05 13:50:26,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:50:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78279 states. [2021-06-05 13:50:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78279 to 70642. [2021-06-05 13:50:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70642 states, 70641 states have (on average 3.966903073286052) internal successors, (280226), 70641 states have internal predecessors, (280226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70642 states to 70642 states and 280226 transitions. [2021-06-05 13:50:28,709 INFO L78 Accepts]: Start accepts. Automaton has 70642 states and 280226 transitions. Word has length 25 [2021-06-05 13:50:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:28,710 INFO L482 AbstractCegarLoop]: Abstraction has 70642 states and 280226 transitions. [2021-06-05 13:50:28,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 70642 states and 280226 transitions. [2021-06-05 13:50:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:28,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:28,841 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:29,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 13:50:29,057 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1963061844, now seen corresponding path program 32 times [2021-06-05 13:50:29,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:29,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573586340] [2021-06-05 13:50:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:29,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:29,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573586340] [2021-06-05 13:50:29,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573586340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:29,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986497069] [2021-06-05 13:50:29,090 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 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 13:50:29,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:50:29,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:29,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:50:29,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:29,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986497069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:29,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:29,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:50:29,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395444868] [2021-06-05 13:50:29,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:29,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:29,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:29,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:29,221 INFO L87 Difference]: Start difference. First operand 70642 states and 280226 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:29,737 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 13:50:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:30,306 INFO L93 Difference]: Finished difference Result 72232 states and 284421 transitions. [2021-06-05 13:50:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:50:30,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:30,504 INFO L225 Difference]: With dead ends: 72232 [2021-06-05 13:50:30,504 INFO L226 Difference]: Without dead ends: 72158 [2021-06-05 13:50:30,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=303, Invalid=1029, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:50:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72158 states. [2021-06-05 13:50:31,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72158 to 70811. [2021-06-05 13:50:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70811 states, 70810 states have (on average 3.964454173139387) internal successors, (280723), 70810 states have internal predecessors, (280723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70811 states to 70811 states and 280723 transitions. [2021-06-05 13:50:32,132 INFO L78 Accepts]: Start accepts. Automaton has 70811 states and 280723 transitions. Word has length 25 [2021-06-05 13:50:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:32,133 INFO L482 AbstractCegarLoop]: Abstraction has 70811 states and 280723 transitions. [2021-06-05 13:50:32,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:32,133 INFO L276 IsEmpty]: Start isEmpty. Operand 70811 states and 280723 transitions. [2021-06-05 13:50:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:32,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:32,605 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:32,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 13:50:32,828 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:32,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2056806376, now seen corresponding path program 100 times [2021-06-05 13:50:32,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:32,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144769397] [2021-06-05 13:50:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:32,874 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 13:50:32,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:32,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144769397] [2021-06-05 13:50:32,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144769397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:32,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865817145] [2021-06-05 13:50:32,874 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 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 13:50:32,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:50:32,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:32,990 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 13:50:32,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865817145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:32,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:32,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:50:32,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627079600] [2021-06-05 13:50:32,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:32,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:32,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:32,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:32,990 INFO L87 Difference]: Start difference. First operand 70811 states and 280723 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:34,137 INFO L93 Difference]: Finished difference Result 88145 states and 342080 transitions. [2021-06-05 13:50:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:50:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:34,396 INFO L225 Difference]: With dead ends: 88145 [2021-06-05 13:50:34,396 INFO L226 Difference]: Without dead ends: 88121 [2021-06-05 13:50:34,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:50:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88121 states. [2021-06-05 13:50:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88121 to 70823. [2021-06-05 13:50:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70823 states, 70822 states have (on average 3.964191917765666) internal successors, (280752), 70822 states have internal predecessors, (280752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70823 states to 70823 states and 280752 transitions. [2021-06-05 13:50:36,414 INFO L78 Accepts]: Start accepts. Automaton has 70823 states and 280752 transitions. Word has length 25 [2021-06-05 13:50:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:36,414 INFO L482 AbstractCegarLoop]: Abstraction has 70823 states and 280752 transitions. [2021-06-05 13:50:36,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 70823 states and 280752 transitions. [2021-06-05 13:50:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:36,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:36,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:36,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 13:50:36,749 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:36,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1316458780, now seen corresponding path program 101 times [2021-06-05 13:50:36,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:36,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133575419] [2021-06-05 13:50:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:36,794 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 13:50:36,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:36,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133575419] [2021-06-05 13:50:36,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133575419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:36,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076863594] [2021-06-05 13:50:36,794 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 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 13:50:36,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:50:36,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:36,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:50:36,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:36,945 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 13:50:36,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076863594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:36,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:36,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:50:36,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058717334] [2021-06-05 13:50:36,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:36,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:36,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:36,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:36,946 INFO L87 Difference]: Start difference. First operand 70823 states and 280752 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:38,620 INFO L93 Difference]: Finished difference Result 94031 states and 360249 transitions. [2021-06-05 13:50:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 13:50:38,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:38,900 INFO L225 Difference]: With dead ends: 94031 [2021-06-05 13:50:38,901 INFO L226 Difference]: Without dead ends: 94019 [2021-06-05 13:50:38,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 814.6ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:50:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94019 states. [2021-06-05 13:50:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94019 to 70832. [2021-06-05 13:50:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70832 states, 70831 states have (on average 3.9640694046392118) internal successors, (280779), 70831 states have internal predecessors, (280779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70832 states to 70832 states and 280779 transitions. [2021-06-05 13:50:41,118 INFO L78 Accepts]: Start accepts. Automaton has 70832 states and 280779 transitions. Word has length 25 [2021-06-05 13:50:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:41,118 INFO L482 AbstractCegarLoop]: Abstraction has 70832 states and 280779 transitions. [2021-06-05 13:50:41,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 70832 states and 280779 transitions. [2021-06-05 13:50:41,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:41,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:41,248 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:41,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 13:50:41,464 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:41,464 INFO L82 PathProgramCache]: Analyzing trace with hash -337901336, now seen corresponding path program 102 times [2021-06-05 13:50:41,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:41,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192283205] [2021-06-05 13:50:41,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:41,512 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 13:50:41,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:41,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192283205] [2021-06-05 13:50:41,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192283205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:41,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388146834] [2021-06-05 13:50:41,513 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 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 13:50:41,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:50:41,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:41,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:50:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:41,650 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 13:50:41,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388146834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:41,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:41,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:50:41,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658522978] [2021-06-05 13:50:41,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:50:41,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:41,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:50:41,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:50:41,651 INFO L87 Difference]: Start difference. First operand 70832 states and 280779 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:43,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:43,335 INFO L93 Difference]: Finished difference Result 97854 states and 373707 transitions. [2021-06-05 13:50:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:50:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:43,610 INFO L225 Difference]: With dead ends: 97854 [2021-06-05 13:50:43,610 INFO L226 Difference]: Without dead ends: 97833 [2021-06-05 13:50:43,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:50:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97833 states. [2021-06-05 13:50:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97833 to 70852. [2021-06-05 13:50:45,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70852 states, 70851 states have (on average 3.9636702375407546) internal successors, (280830), 70851 states have internal predecessors, (280830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70852 states to 70852 states and 280830 transitions. [2021-06-05 13:50:45,513 INFO L78 Accepts]: Start accepts. Automaton has 70852 states and 280830 transitions. Word has length 25 [2021-06-05 13:50:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:45,513 INFO L482 AbstractCegarLoop]: Abstraction has 70852 states and 280830 transitions. [2021-06-05 13:50:45,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 70852 states and 280830 transitions. [2021-06-05 13:50:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:45,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:45,645 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:45,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 13:50:45,852 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1109129320, now seen corresponding path program 33 times [2021-06-05 13:50:45,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:45,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652657776] [2021-06-05 13:50:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:45,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:45,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652657776] [2021-06-05 13:50:45,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652657776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:45,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704937814] [2021-06-05 13:50:45,893 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 13:50:45,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:50:45,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:45,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:50:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:46,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704937814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:46,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:46,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:50:46,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322968409] [2021-06-05 13:50:46,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:46,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:46,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:46,020 INFO L87 Difference]: Start difference. First operand 70852 states and 280830 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:46,452 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-06-05 13:50:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:46,971 INFO L93 Difference]: Finished difference Result 71288 states and 281968 transitions. [2021-06-05 13:50:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:50:46,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:47,173 INFO L225 Difference]: With dead ends: 71288 [2021-06-05 13:50:47,174 INFO L226 Difference]: Without dead ends: 71288 [2021-06-05 13:50:47,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:50:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71288 states. [2021-06-05 13:50:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71288 to 70868. [2021-06-05 13:50:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70868 states, 70867 states have (on average 3.9633962210902114) internal successors, (280874), 70867 states have internal predecessors, (280874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70868 states to 70868 states and 280874 transitions. [2021-06-05 13:50:48,907 INFO L78 Accepts]: Start accepts. Automaton has 70868 states and 280874 transitions. Word has length 25 [2021-06-05 13:50:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:48,907 INFO L482 AbstractCegarLoop]: Abstraction has 70868 states and 280874 transitions. [2021-06-05 13:50:48,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 70868 states and 280874 transitions. [2021-06-05 13:50:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:49,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:49,039 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:49,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 13:50:49,240 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:49,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1906283616, now seen corresponding path program 34 times [2021-06-05 13:50:49,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:49,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789455910] [2021-06-05 13:50:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:49,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:49,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789455910] [2021-06-05 13:50:49,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789455910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:49,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325769537] [2021-06-05 13:50:49,282 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 13:50:49,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:50:49,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:50:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:49,915 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 13:50:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:50,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325769537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:50,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:50,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:50:50,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682556669] [2021-06-05 13:50:50,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:50,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:50,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:50,031 INFO L87 Difference]: Start difference. First operand 70868 states and 280874 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:50,779 INFO L93 Difference]: Finished difference Result 71414 states and 282279 transitions. [2021-06-05 13:50:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:50:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:50,986 INFO L225 Difference]: With dead ends: 71414 [2021-06-05 13:50:50,987 INFO L226 Difference]: Without dead ends: 71414 [2021-06-05 13:50:50,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 843.9ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:50:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71414 states. [2021-06-05 13:50:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71414 to 70860. [2021-06-05 13:50:52,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70860 states, 70859 states have (on average 3.9635614389138993) internal successors, (280854), 70859 states have internal predecessors, (280854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70860 states to 70860 states and 280854 transitions. [2021-06-05 13:50:52,685 INFO L78 Accepts]: Start accepts. Automaton has 70860 states and 280854 transitions. Word has length 25 [2021-06-05 13:50:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:52,685 INFO L482 AbstractCegarLoop]: Abstraction has 70860 states and 280854 transitions. [2021-06-05 13:50:52,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 70860 states and 280854 transitions. [2021-06-05 13:50:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:53,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:53,068 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:53,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:50:53,268 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:53,269 INFO L82 PathProgramCache]: Analyzing trace with hash 819946400, now seen corresponding path program 35 times [2021-06-05 13:50:53,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:53,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206096856] [2021-06-05 13:50:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:53,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:53,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206096856] [2021-06-05 13:50:53,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206096856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:53,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50219455] [2021-06-05 13:50:53,309 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 13:50:53,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:50:53,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:53,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:50:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:53,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50219455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:53,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:53,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:50:53,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921857843] [2021-06-05 13:50:53,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:53,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:53,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:53,436 INFO L87 Difference]: Start difference. First operand 70860 states and 280854 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:54,236 INFO L93 Difference]: Finished difference Result 71971 states and 283792 transitions. [2021-06-05 13:50:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:50:54,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:54,445 INFO L225 Difference]: With dead ends: 71971 [2021-06-05 13:50:54,446 INFO L226 Difference]: Without dead ends: 71971 [2021-06-05 13:50:54,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:50:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71971 states. [2021-06-05 13:50:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71971 to 70896. [2021-06-05 13:50:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70896 states, 70895 states have (on average 3.9631849918894138) internal successors, (280970), 70895 states have internal predecessors, (280970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70896 states to 70896 states and 280970 transitions. [2021-06-05 13:50:56,357 INFO L78 Accepts]: Start accepts. Automaton has 70896 states and 280970 transitions. Word has length 25 [2021-06-05 13:50:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:56,357 INFO L482 AbstractCegarLoop]: Abstraction has 70896 states and 280970 transitions. [2021-06-05 13:50:56,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 70896 states and 280970 transitions. [2021-06-05 13:50:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:56,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:56,487 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:50:56,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 13:50:56,687 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:50:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:50:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash 693070752, now seen corresponding path program 36 times [2021-06-05 13:50:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:50:56,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847288007] [2021-06-05 13:50:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:50:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:50:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:56,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:50:56,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847288007] [2021-06-05 13:50:56,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847288007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:56,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815366739] [2021-06-05 13:50:56,725 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 13:50:56,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:50:56,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:50:56,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:50:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:50:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:50:56,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815366739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:50:56,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:50:56,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:50:56,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839262892] [2021-06-05 13:50:56,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:50:56,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:50:56,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:50:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:50:56,850 INFO L87 Difference]: Start difference. First operand 70896 states and 280970 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:50:57,507 INFO L93 Difference]: Finished difference Result 71691 states and 283040 transitions. [2021-06-05 13:50:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:50:57,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:50:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:50:57,712 INFO L225 Difference]: With dead ends: 71691 [2021-06-05 13:50:57,712 INFO L226 Difference]: Without dead ends: 71684 [2021-06-05 13:50:57,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:50:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71684 states. [2021-06-05 13:50:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71684 to 70896. [2021-06-05 13:50:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70896 states, 70895 states have (on average 3.9631567811552295) internal successors, (280968), 70895 states have internal predecessors, (280968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70896 states to 70896 states and 280968 transitions. [2021-06-05 13:50:59,674 INFO L78 Accepts]: Start accepts. Automaton has 70896 states and 280968 transitions. Word has length 25 [2021-06-05 13:50:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:50:59,674 INFO L482 AbstractCegarLoop]: Abstraction has 70896 states and 280968 transitions. [2021-06-05 13:50:59,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:50:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 70896 states and 280968 transitions. [2021-06-05 13:50:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:50:59,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:50:59,799 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:00,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:00,013 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:00,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1193560492, now seen corresponding path program 37 times [2021-06-05 13:51:00,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:00,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209013361] [2021-06-05 13:51:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:00,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:00,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209013361] [2021-06-05 13:51:00,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209013361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:00,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838416977] [2021-06-05 13:51:00,048 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 13:51:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:00,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:00,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:00,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838416977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:00,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:00,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:00,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656828390] [2021-06-05 13:51:00,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:00,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:00,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:00,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:00,174 INFO L87 Difference]: Start difference. First operand 70896 states and 280968 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:00,966 INFO L93 Difference]: Finished difference Result 72744 states and 285939 transitions. [2021-06-05 13:51:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:51:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:01,474 INFO L225 Difference]: With dead ends: 72744 [2021-06-05 13:51:01,475 INFO L226 Difference]: Without dead ends: 72736 [2021-06-05 13:51:01,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:51:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72736 states. [2021-06-05 13:51:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72736 to 70938. [2021-06-05 13:51:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70938 states, 70937 states have (on average 3.962600617449286) internal successors, (281095), 70937 states have internal predecessors, (281095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70938 states to 70938 states and 281095 transitions. [2021-06-05 13:51:02,929 INFO L78 Accepts]: Start accepts. Automaton has 70938 states and 281095 transitions. Word has length 25 [2021-06-05 13:51:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:02,929 INFO L482 AbstractCegarLoop]: Abstraction has 70938 states and 281095 transitions. [2021-06-05 13:51:02,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 70938 states and 281095 transitions. [2021-06-05 13:51:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:03,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:03,053 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:03,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:03,257 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1320436140, now seen corresponding path program 38 times [2021-06-05 13:51:03,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:03,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793729579] [2021-06-05 13:51:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:03,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:03,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793729579] [2021-06-05 13:51:03,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793729579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:03,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844041762] [2021-06-05 13:51:03,290 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 13:51:03,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:03,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:03,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:03,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:03,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844041762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:03,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:03,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:03,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050271736] [2021-06-05 13:51:03,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:03,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:03,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:03,416 INFO L87 Difference]: Start difference. First operand 70938 states and 281095 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:04,473 INFO L93 Difference]: Finished difference Result 72488 states and 285225 transitions. [2021-06-05 13:51:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:51:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:04,690 INFO L225 Difference]: With dead ends: 72488 [2021-06-05 13:51:04,690 INFO L226 Difference]: Without dead ends: 72474 [2021-06-05 13:51:04,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:51:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72474 states. [2021-06-05 13:51:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72474 to 70906. [2021-06-05 13:51:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70906 states, 70905 states have (on average 3.9629504266271773) internal successors, (280993), 70905 states have internal predecessors, (280993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70906 states to 70906 states and 280993 transitions. [2021-06-05 13:51:06,310 INFO L78 Accepts]: Start accepts. Automaton has 70906 states and 280993 transitions. Word has length 25 [2021-06-05 13:51:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:06,310 INFO L482 AbstractCegarLoop]: Abstraction has 70906 states and 280993 transitions. [2021-06-05 13:51:06,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 70906 states and 280993 transitions. [2021-06-05 13:51:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:06,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:06,447 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:06,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:06,647 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1138256728, now seen corresponding path program 39 times [2021-06-05 13:51:06,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:06,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250105399] [2021-06-05 13:51:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:06,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:06,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250105399] [2021-06-05 13:51:06,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250105399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:06,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447808461] [2021-06-05 13:51:06,695 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 13:51:06,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:51:06,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:06,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:06,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:06,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447808461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:06,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:06,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:06,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154470977] [2021-06-05 13:51:06,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:06,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:06,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:06,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:06,860 INFO L87 Difference]: Start difference. First operand 70906 states and 280993 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:07,893 INFO L93 Difference]: Finished difference Result 72105 states and 284123 transitions. [2021-06-05 13:51:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:51:07,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:08,094 INFO L225 Difference]: With dead ends: 72105 [2021-06-05 13:51:08,094 INFO L226 Difference]: Without dead ends: 72063 [2021-06-05 13:51:08,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:51:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72063 states. [2021-06-05 13:51:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72063 to 70865. [2021-06-05 13:51:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70865 states, 70864 states have (on average 3.9636627906976742) internal successors, (280881), 70864 states have internal predecessors, (280881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70865 states to 70865 states and 280881 transitions. [2021-06-05 13:51:09,758 INFO L78 Accepts]: Start accepts. Automaton has 70865 states and 280881 transitions. Word has length 25 [2021-06-05 13:51:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:09,758 INFO L482 AbstractCegarLoop]: Abstraction has 70865 states and 280881 transitions. [2021-06-05 13:51:09,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 70865 states and 280881 transitions. [2021-06-05 13:51:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:09,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:09,882 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:10,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 13:51:10,082 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:10,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:10,082 INFO L82 PathProgramCache]: Analyzing trace with hash 586655720, now seen corresponding path program 103 times [2021-06-05 13:51:10,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:10,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406184707] [2021-06-05 13:51:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,124 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 13:51:10,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:10,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406184707] [2021-06-05 13:51:10,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406184707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:10,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021515258] [2021-06-05 13:51:10,124 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 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 13:51:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:51:10,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:10,241 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 13:51:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021515258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:10,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:10,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:51:10,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766301996] [2021-06-05 13:51:10,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:10,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:10,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:10,242 INFO L87 Difference]: Start difference. First operand 70865 states and 280881 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:11,090 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 14 [2021-06-05 13:51:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:11,715 INFO L93 Difference]: Finished difference Result 91926 states and 355848 transitions. [2021-06-05 13:51:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:51:11,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:11,955 INFO L225 Difference]: With dead ends: 91926 [2021-06-05 13:51:11,956 INFO L226 Difference]: Without dead ends: 91902 [2021-06-05 13:51:11,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 957.7ms TimeCoverageRelationStatistics Valid=506, Invalid=1846, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 13:51:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91902 states. [2021-06-05 13:51:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91902 to 70869. [2021-06-05 13:51:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70869 states, 70868 states have (on average 3.9635237342665235) internal successors, (280887), 70868 states have internal predecessors, (280887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70869 states to 70869 states and 280887 transitions. [2021-06-05 13:51:13,997 INFO L78 Accepts]: Start accepts. Automaton has 70869 states and 280887 transitions. Word has length 25 [2021-06-05 13:51:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:13,997 INFO L482 AbstractCegarLoop]: Abstraction has 70869 states and 280887 transitions. [2021-06-05 13:51:13,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 70869 states and 280887 transitions. [2021-06-05 13:51:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:14,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:14,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:14,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:14,315 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:14,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1508357860, now seen corresponding path program 104 times [2021-06-05 13:51:14,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:14,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895384235] [2021-06-05 13:51:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:14,355 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 13:51:14,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:14,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895384235] [2021-06-05 13:51:14,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895384235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:14,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617533106] [2021-06-05 13:51:14,355 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 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 13:51:14,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:14,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:51:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:14,478 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 13:51:14,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617533106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:14,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:14,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:51:14,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812756067] [2021-06-05 13:51:14,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:14,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:14,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:14,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:14,478 INFO L87 Difference]: Start difference. First operand 70869 states and 280887 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:16,334 INFO L93 Difference]: Finished difference Result 118622 states and 455374 transitions. [2021-06-05 13:51:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 13:51:16,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:16,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:16,721 INFO L225 Difference]: With dead ends: 118622 [2021-06-05 13:51:16,721 INFO L226 Difference]: Without dead ends: 118608 [2021-06-05 13:51:16,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 916.0ms TimeCoverageRelationStatistics Valid=781, Invalid=3251, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 13:51:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118608 states. [2021-06-05 13:51:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118608 to 71195. [2021-06-05 13:51:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71195 states, 71194 states have (on average 3.9650110964407115) internal successors, (282285), 71194 states have internal predecessors, (282285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71195 states to 71195 states and 282285 transitions. [2021-06-05 13:51:19,056 INFO L78 Accepts]: Start accepts. Automaton has 71195 states and 282285 transitions. Word has length 25 [2021-06-05 13:51:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:19,056 INFO L482 AbstractCegarLoop]: Abstraction has 71195 states and 282285 transitions. [2021-06-05 13:51:19,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 71195 states and 282285 transitions. [2021-06-05 13:51:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:19,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:19,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:19,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 13:51:19,383 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1808051992, now seen corresponding path program 105 times [2021-06-05 13:51:19,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:19,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113683712] [2021-06-05 13:51:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:19,424 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 13:51:19,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113683712] [2021-06-05 13:51:19,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113683712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312708057] [2021-06-05 13:51:19,424 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 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 13:51:19,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:51:19,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:19,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:51:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:19,544 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 13:51:19,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312708057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:19,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:19,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:51:19,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060647202] [2021-06-05 13:51:19,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:19,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:19,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:19,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:19,545 INFO L87 Difference]: Start difference. First operand 71195 states and 282285 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:21,395 INFO L93 Difference]: Finished difference Result 122405 states and 469340 transitions. [2021-06-05 13:51:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 13:51:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:21,746 INFO L225 Difference]: With dead ends: 122405 [2021-06-05 13:51:21,746 INFO L226 Difference]: Without dead ends: 122405 [2021-06-05 13:51:21,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=750, Invalid=2910, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:51:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122405 states. [2021-06-05 13:51:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122405 to 71168. [2021-06-05 13:51:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71168 states, 71167 states have (on average 3.964787050177751) internal successors, (282162), 71167 states have internal predecessors, (282162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71168 states to 71168 states and 282162 transitions. [2021-06-05 13:51:24,579 INFO L78 Accepts]: Start accepts. Automaton has 71168 states and 282162 transitions. Word has length 25 [2021-06-05 13:51:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:24,579 INFO L482 AbstractCegarLoop]: Abstraction has 71168 states and 282162 transitions. [2021-06-05 13:51:24,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 71168 states and 282162 transitions. [2021-06-05 13:51:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:24,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:24,713 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:24,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 13:51:24,929 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:24,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:24,929 INFO L82 PathProgramCache]: Analyzing trace with hash -813211544, now seen corresponding path program 40 times [2021-06-05 13:51:24,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:24,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362096450] [2021-06-05 13:51:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:24,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:24,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362096450] [2021-06-05 13:51:24,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362096450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:24,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234578841] [2021-06-05 13:51:24,969 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 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 13:51:24,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:24,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:24,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:24,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:25,091 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 13:51:25,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234578841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:25,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:25,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:25,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901129278] [2021-06-05 13:51:25,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:25,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:25,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:25,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:25,092 INFO L87 Difference]: Start difference. First operand 71168 states and 282162 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:25,658 INFO L93 Difference]: Finished difference Result 71556 states and 283218 transitions. [2021-06-05 13:51:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:51:25,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:25,870 INFO L225 Difference]: With dead ends: 71556 [2021-06-05 13:51:25,871 INFO L226 Difference]: Without dead ends: 71556 [2021-06-05 13:51:25,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:51:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71556 states. [2021-06-05 13:51:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71556 to 71214. [2021-06-05 13:51:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71214 states, 71213 states have (on average 3.9642059736284105) internal successors, (282303), 71213 states have internal predecessors, (282303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71214 states to 71214 states and 282303 transitions. [2021-06-05 13:51:27,734 INFO L78 Accepts]: Start accepts. Automaton has 71214 states and 282303 transitions. Word has length 25 [2021-06-05 13:51:27,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:27,734 INFO L482 AbstractCegarLoop]: Abstraction has 71214 states and 282303 transitions. [2021-06-05 13:51:27,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 71214 states and 282303 transitions. [2021-06-05 13:51:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:27,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:27,866 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:28,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:28,066 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:28,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:28,066 INFO L82 PathProgramCache]: Analyzing trace with hash 466342816, now seen corresponding path program 41 times [2021-06-05 13:51:28,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:28,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804345048] [2021-06-05 13:51:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:28,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:28,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804345048] [2021-06-05 13:51:28,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804345048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:28,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350392819] [2021-06-05 13:51:28,105 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 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 13:51:28,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:51:28,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:28,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:28,225 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 13:51:28,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350392819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:28,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:28,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:28,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964343913] [2021-06-05 13:51:28,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:28,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:28,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:28,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:28,226 INFO L87 Difference]: Start difference. First operand 71214 states and 282303 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:29,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:29,322 INFO L93 Difference]: Finished difference Result 71934 states and 284187 transitions. [2021-06-05 13:51:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:51:29,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:29,532 INFO L225 Difference]: With dead ends: 71934 [2021-06-05 13:51:29,532 INFO L226 Difference]: Without dead ends: 71934 [2021-06-05 13:51:29,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:51:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71934 states. [2021-06-05 13:51:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71934 to 71214. [2021-06-05 13:51:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71214 states, 71213 states have (on average 3.9642059736284105) internal successors, (282303), 71213 states have internal predecessors, (282303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71214 states to 71214 states and 282303 transitions. [2021-06-05 13:51:31,065 INFO L78 Accepts]: Start accepts. Automaton has 71214 states and 282303 transitions. Word has length 25 [2021-06-05 13:51:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:31,065 INFO L482 AbstractCegarLoop]: Abstraction has 71214 states and 282303 transitions. [2021-06-05 13:51:31,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 71214 states and 282303 transitions. [2021-06-05 13:51:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:31,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:31,197 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:31,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 13:51:31,398 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:31,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:31,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1102394464, now seen corresponding path program 42 times [2021-06-05 13:51:31,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:31,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906226414] [2021-06-05 13:51:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:31,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:31,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906226414] [2021-06-05 13:51:31,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906226414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:31,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819999540] [2021-06-05 13:51:31,438 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 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 13:51:31,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:51:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:31,564 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 13:51:31,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819999540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:31,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:31,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:31,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542961972] [2021-06-05 13:51:31,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:31,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:31,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:31,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:31,565 INFO L87 Difference]: Start difference. First operand 71214 states and 282303 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:32,706 INFO L93 Difference]: Finished difference Result 72449 states and 285567 transitions. [2021-06-05 13:51:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:51:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:32,922 INFO L225 Difference]: With dead ends: 72449 [2021-06-05 13:51:32,922 INFO L226 Difference]: Without dead ends: 72449 [2021-06-05 13:51:32,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=343, Invalid=1217, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:51:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72449 states. [2021-06-05 13:51:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72449 to 71236. [2021-06-05 13:51:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71236 states, 71235 states have (on average 3.963978381413631) internal successors, (282374), 71235 states have internal predecessors, (282374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71236 states to 71236 states and 282374 transitions. [2021-06-05 13:51:34,597 INFO L78 Accepts]: Start accepts. Automaton has 71236 states and 282374 transitions. Word has length 25 [2021-06-05 13:51:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:34,597 INFO L482 AbstractCegarLoop]: Abstraction has 71236 states and 282374 transitions. [2021-06-05 13:51:34,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 71236 states and 282374 transitions. [2021-06-05 13:51:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:34,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:34,730 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:34,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 13:51:34,930 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:34,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1229270112, now seen corresponding path program 43 times [2021-06-05 13:51:34,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:34,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687625261] [2021-06-05 13:51:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:34,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687625261] [2021-06-05 13:51:34,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687625261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647000539] [2021-06-05 13:51:34,978 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 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 13:51:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:35,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:35,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647000539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:35,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:35,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:35,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239625546] [2021-06-05 13:51:35,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:35,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:35,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:35,105 INFO L87 Difference]: Start difference. First operand 71236 states and 282374 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:36,122 INFO L93 Difference]: Finished difference Result 72089 states and 284601 transitions. [2021-06-05 13:51:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:51:36,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:36,329 INFO L225 Difference]: With dead ends: 72089 [2021-06-05 13:51:36,330 INFO L226 Difference]: Without dead ends: 72082 [2021-06-05 13:51:36,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:51:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72082 states. [2021-06-05 13:51:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72082 to 71154. [2021-06-05 13:51:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71154 states, 71153 states have (on average 3.96476606748837) internal successors, (282105), 71153 states have internal predecessors, (282105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71154 states to 71154 states and 282105 transitions. [2021-06-05 13:51:38,032 INFO L78 Accepts]: Start accepts. Automaton has 71154 states and 282105 transitions. Word has length 25 [2021-06-05 13:51:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:38,032 INFO L482 AbstractCegarLoop]: Abstraction has 71154 states and 282105 transitions. [2021-06-05 13:51:38,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 71154 states and 282105 transitions. [2021-06-05 13:51:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:38,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:38,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:38,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:38,367 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash -559391772, now seen corresponding path program 44 times [2021-06-05 13:51:38,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:38,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143308415] [2021-06-05 13:51:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:38,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:38,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143308415] [2021-06-05 13:51:38,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143308415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:38,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869218197] [2021-06-05 13:51:38,410 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 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 13:51:38,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:38,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:38,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:38,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869218197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:38,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:38,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:38,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78088212] [2021-06-05 13:51:38,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:38,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:38,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:38,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:38,534 INFO L87 Difference]: Start difference. First operand 71154 states and 282105 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:39,384 INFO L93 Difference]: Finished difference Result 71508 states and 283066 transitions. [2021-06-05 13:51:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:51:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:39,598 INFO L225 Difference]: With dead ends: 71508 [2021-06-05 13:51:39,598 INFO L226 Difference]: Without dead ends: 71508 [2021-06-05 13:51:39,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:51:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71508 states. [2021-06-05 13:51:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71508 to 71116. [2021-06-05 13:51:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71116 states, 71115 states have (on average 3.965155030584265) internal successors, (281982), 71115 states have internal predecessors, (281982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71116 states to 71116 states and 281982 transitions. [2021-06-05 13:51:41,186 INFO L78 Accepts]: Start accepts. Automaton has 71116 states and 281982 transitions. Word has length 25 [2021-06-05 13:51:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:41,186 INFO L482 AbstractCegarLoop]: Abstraction has 71116 states and 281982 transitions. [2021-06-05 13:51:41,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 71116 states and 281982 transitions. [2021-06-05 13:51:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:41,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:41,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:41,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:41,513 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash -863069536, now seen corresponding path program 106 times [2021-06-05 13:51:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:41,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108694870] [2021-06-05 13:51:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:41,556 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 13:51:41,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:41,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108694870] [2021-06-05 13:51:41,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108694870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:41,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338761393] [2021-06-05 13:51:41,556 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 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 13:51:41,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:41,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:51:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:41,673 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 13:51:41,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338761393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:41,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:41,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 13:51:41,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994578189] [2021-06-05 13:51:41,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:41,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:41,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:41,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:41,673 INFO L87 Difference]: Start difference. First operand 71116 states and 281982 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:42,771 INFO L93 Difference]: Finished difference Result 87276 states and 339273 transitions. [2021-06-05 13:51:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:51:42,772 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:43,003 INFO L225 Difference]: With dead ends: 87276 [2021-06-05 13:51:43,003 INFO L226 Difference]: Without dead ends: 87248 [2021-06-05 13:51:43,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:51:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87248 states. [2021-06-05 13:51:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87248 to 71104. [2021-06-05 13:51:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71104 states, 71103 states have (on average 3.965402303700266) internal successors, (281952), 71103 states have internal predecessors, (281952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71104 states to 71104 states and 281952 transitions. [2021-06-05 13:51:45,026 INFO L78 Accepts]: Start accepts. Automaton has 71104 states and 281952 transitions. Word has length 25 [2021-06-05 13:51:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:45,026 INFO L482 AbstractCegarLoop]: Abstraction has 71104 states and 281952 transitions. [2021-06-05 13:51:45,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 71104 states and 281952 transitions. [2021-06-05 13:51:45,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:45,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:45,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:45,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:45,352 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash -797437524, now seen corresponding path program 107 times [2021-06-05 13:51:45,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:45,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077333997] [2021-06-05 13:51:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:45,381 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 13:51:45,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077333997] [2021-06-05 13:51:45,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077333997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274142007] [2021-06-05 13:51:45,381 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 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 13:51:45,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:51:45,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:45,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:51:45,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:45,491 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 13:51:45,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274142007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:45,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:45,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:51:45,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535943438] [2021-06-05 13:51:45,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:51:45,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:45,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:51:45,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:51:45,492 INFO L87 Difference]: Start difference. First operand 71104 states and 281952 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:47,358 INFO L93 Difference]: Finished difference Result 120833 states and 461051 transitions. [2021-06-05 13:51:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:51:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:47,693 INFO L225 Difference]: With dead ends: 120833 [2021-06-05 13:51:47,693 INFO L226 Difference]: Without dead ends: 120798 [2021-06-05 13:51:47,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 789.0ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:51:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120798 states. [2021-06-05 13:51:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120798 to 77283. [2021-06-05 13:51:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77283 states, 77282 states have (on average 3.9678320954426645) internal successors, (306642), 77282 states have internal predecessors, (306642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77283 states to 77283 states and 306642 transitions. [2021-06-05 13:51:50,181 INFO L78 Accepts]: Start accepts. Automaton has 77283 states and 306642 transitions. Word has length 25 [2021-06-05 13:51:50,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:50,182 INFO L482 AbstractCegarLoop]: Abstraction has 77283 states and 306642 transitions. [2021-06-05 13:51:50,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 77283 states and 306642 transitions. [2021-06-05 13:51:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:50,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:50,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:50,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:50,519 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:50,519 INFO L82 PathProgramCache]: Analyzing trace with hash 650785256, now seen corresponding path program 108 times [2021-06-05 13:51:50,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:50,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032371317] [2021-06-05 13:51:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:50,547 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 13:51:50,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:50,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032371317] [2021-06-05 13:51:50,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032371317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:50,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701737911] [2021-06-05 13:51:50,548 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 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 13:51:50,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:51:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:51:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:50,659 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 13:51:50,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701737911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:50,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:50,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:51:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442672446] [2021-06-05 13:51:50,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:51:50,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:50,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:51:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:51:50,660 INFO L87 Difference]: Start difference. First operand 77283 states and 306642 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:52,604 INFO L93 Difference]: Finished difference Result 101728 states and 389754 transitions. [2021-06-05 13:51:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 13:51:52,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:52,891 INFO L225 Difference]: With dead ends: 101728 [2021-06-05 13:51:52,892 INFO L226 Difference]: Without dead ends: 101693 [2021-06-05 13:51:52,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 914.2ms TimeCoverageRelationStatistics Valid=1024, Invalid=3806, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:51:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101693 states. [2021-06-05 13:51:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101693 to 76534. [2021-06-05 13:51:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76534 states, 76533 states have (on average 3.9670338285445492) internal successors, (303609), 76533 states have internal predecessors, (303609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76534 states to 76534 states and 303609 transitions. [2021-06-05 13:51:55,184 INFO L78 Accepts]: Start accepts. Automaton has 76534 states and 303609 transitions. Word has length 25 [2021-06-05 13:51:55,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:55,185 INFO L482 AbstractCegarLoop]: Abstraction has 76534 states and 303609 transitions. [2021-06-05 13:51:55,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 76534 states and 303609 transitions. [2021-06-05 13:51:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:55,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:55,326 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:55,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:55,533 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:55,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1063817676, now seen corresponding path program 45 times [2021-06-05 13:51:55,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:55,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204990116] [2021-06-05 13:51:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:55,563 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 13:51:55,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:55,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204990116] [2021-06-05 13:51:55,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204990116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:55,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877213079] [2021-06-05 13:51:55,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:51:55,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:51:55,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:55,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:55,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:55,686 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 13:51:55,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877213079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:55,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:55,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:55,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733143780] [2021-06-05 13:51:55,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:55,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:55,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:55,687 INFO L87 Difference]: Start difference. First operand 76534 states and 303609 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:57,007 INFO L93 Difference]: Finished difference Result 79322 states and 310971 transitions. [2021-06-05 13:51:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 13:51:57,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:51:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:57,649 INFO L225 Difference]: With dead ends: 79322 [2021-06-05 13:51:57,649 INFO L226 Difference]: Without dead ends: 79310 [2021-06-05 13:51:57,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 766.7ms TimeCoverageRelationStatistics Valid=938, Invalid=2602, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 13:51:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79310 states. [2021-06-05 13:51:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79310 to 76812. [2021-06-05 13:51:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76812 states, 76811 states have (on average 3.9637812292510186) internal successors, (304462), 76811 states have internal predecessors, (304462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76812 states to 76812 states and 304462 transitions. [2021-06-05 13:51:59,391 INFO L78 Accepts]: Start accepts. Automaton has 76812 states and 304462 transitions. Word has length 25 [2021-06-05 13:51:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:59,391 INFO L482 AbstractCegarLoop]: Abstraction has 76812 states and 304462 transitions. [2021-06-05 13:51:59,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 76812 states and 304462 transitions. [2021-06-05 13:51:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:51:59,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:59,540 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:59,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 13:51:59,741 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:59,741 INFO L82 PathProgramCache]: Analyzing trace with hash -631795252, now seen corresponding path program 46 times [2021-06-05 13:51:59,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:59,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085815053] [2021-06-05 13:51:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:59,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:59,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085815053] [2021-06-05 13:51:59,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085815053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:59,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971887796] [2021-06-05 13:51:59,768 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 13:51:59,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:59,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:59,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:51:59,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:59,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971887796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:59,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:59,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:59,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021673083] [2021-06-05 13:51:59,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:59,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:59,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:59,892 INFO L87 Difference]: Start difference. First operand 76812 states and 304462 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:01,422 INFO L93 Difference]: Finished difference Result 78682 states and 309209 transitions. [2021-06-05 13:52:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 13:52:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:01,646 INFO L225 Difference]: With dead ends: 78682 [2021-06-05 13:52:01,646 INFO L226 Difference]: Without dead ends: 78661 [2021-06-05 13:52:01,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 965.1ms TimeCoverageRelationStatistics Valid=760, Invalid=2320, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 13:52:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78661 states. [2021-06-05 13:52:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78661 to 76682. [2021-06-05 13:52:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76682 states, 76681 states have (on average 3.9649848071882214) internal successors, (304039), 76681 states have internal predecessors, (304039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76682 states to 76682 states and 304039 transitions. [2021-06-05 13:52:03,764 INFO L78 Accepts]: Start accepts. Automaton has 76682 states and 304039 transitions. Word has length 25 [2021-06-05 13:52:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:03,765 INFO L482 AbstractCegarLoop]: Abstraction has 76682 states and 304039 transitions. [2021-06-05 13:52:03,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 76682 states and 304039 transitions. [2021-06-05 13:52:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:03,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:03,916 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:04,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 13:52:04,116 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:04,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:04,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1261594988, now seen corresponding path program 47 times [2021-06-05 13:52:04,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:04,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837746205] [2021-06-05 13:52:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:04,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:04,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837746205] [2021-06-05 13:52:04,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837746205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:04,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552192349] [2021-06-05 13:52:04,143 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 13:52:04,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:52:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:52:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:04,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552192349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:04,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:04,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:04,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217262501] [2021-06-05 13:52:04,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:04,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:04,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:04,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:04,268 INFO L87 Difference]: Start difference. First operand 76682 states and 304039 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:05,343 INFO L93 Difference]: Finished difference Result 78312 states and 308349 transitions. [2021-06-05 13:52:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:52:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:05,584 INFO L225 Difference]: With dead ends: 78312 [2021-06-05 13:52:05,584 INFO L226 Difference]: Without dead ends: 78270 [2021-06-05 13:52:05,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 534.8ms TimeCoverageRelationStatistics Valid=533, Invalid=1723, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:52:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78270 states. [2021-06-05 13:52:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78270 to 76682. [2021-06-05 13:52:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76682 states, 76681 states have (on average 3.9649326430276077) internal successors, (304035), 76681 states have internal predecessors, (304035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76682 states to 76682 states and 304035 transitions. [2021-06-05 13:52:07,588 INFO L78 Accepts]: Start accepts. Automaton has 76682 states and 304035 transitions. Word has length 25 [2021-06-05 13:52:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:07,588 INFO L482 AbstractCegarLoop]: Abstraction has 76682 states and 304035 transitions. [2021-06-05 13:52:07,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 76682 states and 304035 transitions. [2021-06-05 13:52:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:07,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:07,736 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:07,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 13:52:07,936 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:07,937 INFO L82 PathProgramCache]: Analyzing trace with hash -938636140, now seen corresponding path program 48 times [2021-06-05 13:52:07,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:07,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061283781] [2021-06-05 13:52:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:07,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:07,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061283781] [2021-06-05 13:52:07,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061283781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:07,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181549001] [2021-06-05 13:52:07,968 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 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 13:52:07,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:52:07,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:07,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:52:07,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:08,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181549001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:08,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:08,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:08,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127415306] [2021-06-05 13:52:08,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:08,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:08,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:08,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:08,094 INFO L87 Difference]: Start difference. First operand 76682 states and 304035 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:09,323 INFO L93 Difference]: Finished difference Result 79167 states and 310773 transitions. [2021-06-05 13:52:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 13:52:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:09,549 INFO L225 Difference]: With dead ends: 79167 [2021-06-05 13:52:09,549 INFO L226 Difference]: Without dead ends: 79093 [2021-06-05 13:52:09,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=420, Invalid=1472, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:52:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79093 states. [2021-06-05 13:52:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79093 to 76852. [2021-06-05 13:52:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76852 states, 76851 states have (on average 3.96255091020286) internal successors, (304526), 76851 states have internal predecessors, (304526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76852 states to 76852 states and 304526 transitions. [2021-06-05 13:52:11,266 INFO L78 Accepts]: Start accepts. Automaton has 76852 states and 304526 transitions. Word has length 25 [2021-06-05 13:52:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:11,266 INFO L482 AbstractCegarLoop]: Abstraction has 76852 states and 304526 transitions. [2021-06-05 13:52:11,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 76852 states and 304526 transitions. [2021-06-05 13:52:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:11,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:11,397 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:11,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 13:52:11,597 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:11,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:11,598 INFO L82 PathProgramCache]: Analyzing trace with hash -801593656, now seen corresponding path program 49 times [2021-06-05 13:52:11,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:11,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288926351] [2021-06-05 13:52:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:11,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:11,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288926351] [2021-06-05 13:52:11,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288926351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851732437] [2021-06-05 13:52:11,626 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 13:52:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:52:11,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:11,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851732437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:11,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:11,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754650657] [2021-06-05 13:52:11,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:11,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:11,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:11,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:11,746 INFO L87 Difference]: Start difference. First operand 76852 states and 304526 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:13,489 INFO L93 Difference]: Finished difference Result 82386 states and 320609 transitions. [2021-06-05 13:52:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:52:13,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:13,728 INFO L225 Difference]: With dead ends: 82386 [2021-06-05 13:52:13,728 INFO L226 Difference]: Without dead ends: 82378 [2021-06-05 13:52:13,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 773.2ms TimeCoverageRelationStatistics Valid=1095, Invalid=3195, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 13:52:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82378 states. [2021-06-05 13:52:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82378 to 77234. [2021-06-05 13:52:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77234 states, 77233 states have (on average 3.9571556200069917) internal successors, (305623), 77233 states have internal predecessors, (305623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77234 states to 77234 states and 305623 transitions. [2021-06-05 13:52:15,810 INFO L78 Accepts]: Start accepts. Automaton has 77234 states and 305623 transitions. Word has length 25 [2021-06-05 13:52:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:15,811 INFO L482 AbstractCegarLoop]: Abstraction has 77234 states and 305623 transitions. [2021-06-05 13:52:15,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 77234 states and 305623 transitions. [2021-06-05 13:52:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:15,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:15,959 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:16,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 13:52:16,160 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:16,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1797760712, now seen corresponding path program 50 times [2021-06-05 13:52:16,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:16,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545123076] [2021-06-05 13:52:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:16,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:16,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545123076] [2021-06-05 13:52:16,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545123076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:16,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197727363] [2021-06-05 13:52:16,195 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 13:52:16,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:16,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:16,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:52:16,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:16,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197727363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:16,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:16,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:16,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289806685] [2021-06-05 13:52:16,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:16,326 INFO L87 Difference]: Start difference. First operand 77234 states and 305623 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:17,762 INFO L93 Difference]: Finished difference Result 81483 states and 318207 transitions. [2021-06-05 13:52:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:52:17,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:18,001 INFO L225 Difference]: With dead ends: 81483 [2021-06-05 13:52:18,001 INFO L226 Difference]: Without dead ends: 81462 [2021-06-05 13:52:18,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 594.1ms TimeCoverageRelationStatistics Valid=701, Invalid=2161, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:52:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81462 states. [2021-06-05 13:52:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81462 to 77196. [2021-06-05 13:52:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77196 states, 77195 states have (on average 3.95738065936913) internal successors, (305490), 77195 states have internal predecessors, (305490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77196 states to 77196 states and 305490 transitions. [2021-06-05 13:52:19,809 INFO L78 Accepts]: Start accepts. Automaton has 77196 states and 305490 transitions. Word has length 25 [2021-06-05 13:52:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:19,809 INFO L482 AbstractCegarLoop]: Abstraction has 77196 states and 305490 transitions. [2021-06-05 13:52:19,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 77196 states and 305490 transitions. [2021-06-05 13:52:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:20,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:20,320 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:20,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:20,533 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1167960976, now seen corresponding path program 51 times [2021-06-05 13:52:20,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:20,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496034264] [2021-06-05 13:52:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:20,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:20,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496034264] [2021-06-05 13:52:20,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496034264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:20,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779280227] [2021-06-05 13:52:20,563 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 13:52:20,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:52:20,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:20,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:52:20,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:20,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779280227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:20,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:20,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:20,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361985292] [2021-06-05 13:52:20,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:20,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:20,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:20,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:20,685 INFO L87 Difference]: Start difference. First operand 77196 states and 305490 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:21,872 INFO L93 Difference]: Finished difference Result 81233 states and 317500 transitions. [2021-06-05 13:52:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 13:52:21,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:22,096 INFO L225 Difference]: With dead ends: 81233 [2021-06-05 13:52:22,096 INFO L226 Difference]: Without dead ends: 81170 [2021-06-05 13:52:22,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 583.7ms TimeCoverageRelationStatistics Valid=677, Invalid=2293, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 13:52:22,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81170 states. [2021-06-05 13:52:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81170 to 76905. [2021-06-05 13:52:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76905 states, 76904 states have (on average 3.9601711224383647) internal successors, (304553), 76904 states have internal predecessors, (304553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76905 states to 76905 states and 304553 transitions. [2021-06-05 13:52:24,093 INFO L78 Accepts]: Start accepts. Automaton has 76905 states and 304553 transitions. Word has length 25 [2021-06-05 13:52:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:24,093 INFO L482 AbstractCegarLoop]: Abstraction has 76905 states and 304553 transitions. [2021-06-05 13:52:24,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 76905 states and 304553 transitions. [2021-06-05 13:52:24,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:24,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:24,235 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:24,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 13:52:24,436 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:24,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1279246648, now seen corresponding path program 52 times [2021-06-05 13:52:24,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:24,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274292786] [2021-06-05 13:52:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:24,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:24,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274292786] [2021-06-05 13:52:24,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274292786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:24,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993704240] [2021-06-05 13:52:24,465 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 13:52:24,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:24,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:24,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:52:24,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:24,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993704240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:24,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:24,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:24,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780500589] [2021-06-05 13:52:24,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:24,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:24,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:24,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:24,587 INFO L87 Difference]: Start difference. First operand 76905 states and 304553 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:26,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:26,200 INFO L93 Difference]: Finished difference Result 80828 states and 316179 transitions. [2021-06-05 13:52:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 13:52:26,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:26,421 INFO L225 Difference]: With dead ends: 80828 [2021-06-05 13:52:26,421 INFO L226 Difference]: Without dead ends: 80820 [2021-06-05 13:52:26,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:52:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80820 states. [2021-06-05 13:52:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80820 to 77177. [2021-06-05 13:52:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77177 states, 77176 states have (on average 3.9595729242251476) internal successors, (305584), 77176 states have internal predecessors, (305584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77177 states to 77177 states and 305584 transitions. [2021-06-05 13:52:28,651 INFO L78 Accepts]: Start accepts. Automaton has 77177 states and 305584 transitions. Word has length 25 [2021-06-05 13:52:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:28,651 INFO L482 AbstractCegarLoop]: Abstraction has 77177 states and 305584 transitions. [2021-06-05 13:52:28,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 77177 states and 305584 transitions. [2021-06-05 13:52:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:28,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:28,802 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:29,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:29,003 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1446983368, now seen corresponding path program 53 times [2021-06-05 13:52:29,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:29,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397173222] [2021-06-05 13:52:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:29,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:29,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397173222] [2021-06-05 13:52:29,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397173222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:29,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529201346] [2021-06-05 13:52:29,032 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 13:52:29,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:52:29,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:52:29,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:29,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529201346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:29,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:29,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:29,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95655014] [2021-06-05 13:52:29,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:29,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:29,159 INFO L87 Difference]: Start difference. First operand 77177 states and 305584 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:31,081 INFO L93 Difference]: Finished difference Result 82141 states and 319979 transitions. [2021-06-05 13:52:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 13:52:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:31,289 INFO L225 Difference]: With dead ends: 82141 [2021-06-05 13:52:31,289 INFO L226 Difference]: Without dead ends: 82133 [2021-06-05 13:52:31,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 951.4ms TimeCoverageRelationStatistics Valid=1404, Invalid=4758, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 13:52:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82133 states. [2021-06-05 13:52:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82133 to 77489. [2021-06-05 13:52:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77489 states, 77488 states have (on average 3.9567933099318604) internal successors, (306604), 77488 states have internal predecessors, (306604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77489 states to 77489 states and 306604 transitions. [2021-06-05 13:52:33,047 INFO L78 Accepts]: Start accepts. Automaton has 77489 states and 306604 transitions. Word has length 25 [2021-06-05 13:52:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:33,047 INFO L482 AbstractCegarLoop]: Abstraction has 77489 states and 306604 transitions. [2021-06-05 13:52:33,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 77489 states and 306604 transitions. [2021-06-05 13:52:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:33,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:33,193 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:33,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:33,394 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:33,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1320107720, now seen corresponding path program 54 times [2021-06-05 13:52:33,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:33,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399289029] [2021-06-05 13:52:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:33,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:33,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399289029] [2021-06-05 13:52:33,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399289029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:33,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396461325] [2021-06-05 13:52:33,426 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 13:52:33,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:52:33,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:52:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:33,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396461325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:33,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:33,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:33,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603734089] [2021-06-05 13:52:33,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:33,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:33,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:33,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:33,549 INFO L87 Difference]: Start difference. First operand 77489 states and 306604 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:35,199 INFO L93 Difference]: Finished difference Result 81125 states and 317212 transitions. [2021-06-05 13:52:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 13:52:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:35,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:35,436 INFO L225 Difference]: With dead ends: 81125 [2021-06-05 13:52:35,436 INFO L226 Difference]: Without dead ends: 81104 [2021-06-05 13:52:35,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 955.8ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:52:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81104 states. [2021-06-05 13:52:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81104 to 77231. [2021-06-05 13:52:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77231 states, 77230 states have (on average 3.958319305969183) internal successors, (305701), 77230 states have internal predecessors, (305701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77231 states to 77231 states and 305701 transitions. [2021-06-05 13:52:37,471 INFO L78 Accepts]: Start accepts. Automaton has 77231 states and 305701 transitions. Word has length 25 [2021-06-05 13:52:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:37,471 INFO L482 AbstractCegarLoop]: Abstraction has 77231 states and 305701 transitions. [2021-06-05 13:52:37,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 77231 states and 305701 transitions. [2021-06-05 13:52:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:37,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:37,616 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:37,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:37,816 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:37,817 INFO L82 PathProgramCache]: Analyzing trace with hash 252961740, now seen corresponding path program 55 times [2021-06-05 13:52:37,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:37,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160148433] [2021-06-05 13:52:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:37,845 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 13:52:37,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160148433] [2021-06-05 13:52:37,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160148433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227337161] [2021-06-05 13:52:37,846 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 13:52:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:52:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:37,967 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 13:52:37,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227337161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:37,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:37,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:37,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385112124] [2021-06-05 13:52:37,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:37,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:37,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:37,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:37,968 INFO L87 Difference]: Start difference. First operand 77231 states and 305701 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:39,697 INFO L93 Difference]: Finished difference Result 89374 states and 342820 transitions. [2021-06-05 13:52:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 13:52:39,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:39,944 INFO L225 Difference]: With dead ends: 89374 [2021-06-05 13:52:39,945 INFO L226 Difference]: Without dead ends: 89366 [2021-06-05 13:52:39,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1038.4ms TimeCoverageRelationStatistics Valid=1068, Invalid=2964, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 13:52:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89366 states. [2021-06-05 13:52:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89366 to 77056. [2021-06-05 13:52:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77056 states, 77055 states have (on average 3.9589513983518265) internal successors, (305057), 77055 states have internal predecessors, (305057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77056 states to 77056 states and 305057 transitions. [2021-06-05 13:52:42,103 INFO L78 Accepts]: Start accepts. Automaton has 77056 states and 305057 transitions. Word has length 25 [2021-06-05 13:52:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:42,103 INFO L482 AbstractCegarLoop]: Abstraction has 77056 states and 305057 transitions. [2021-06-05 13:52:42,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 77056 states and 305057 transitions. [2021-06-05 13:52:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:42,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:42,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:42,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 13:52:42,435 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1221820392, now seen corresponding path program 109 times [2021-06-05 13:52:42,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:42,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967208172] [2021-06-05 13:52:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:42,462 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 13:52:42,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:42,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967208172] [2021-06-05 13:52:42,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967208172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:42,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155339081] [2021-06-05 13:52:42,462 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 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 13:52:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:42,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:52:42,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:42,571 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 13:52:42,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155339081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:42,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:42,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:52:42,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648564230] [2021-06-05 13:52:42,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:42,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:42,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:42,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:42,571 INFO L87 Difference]: Start difference. First operand 77056 states and 305057 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:45,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:45,013 INFO L93 Difference]: Finished difference Result 141677 states and 539407 transitions. [2021-06-05 13:52:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 13:52:45,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:45,431 INFO L225 Difference]: With dead ends: 141677 [2021-06-05 13:52:45,431 INFO L226 Difference]: Without dead ends: 141663 [2021-06-05 13:52:45,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 1165.1ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 13:52:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141663 states. [2021-06-05 13:52:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141663 to 86321. [2021-06-05 13:52:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86321 states, 86320 states have (on average 3.969439295644115) internal successors, (342642), 86320 states have internal predecessors, (342642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86321 states to 86321 states and 342642 transitions. [2021-06-05 13:52:48,234 INFO L78 Accepts]: Start accepts. Automaton has 86321 states and 342642 transitions. Word has length 25 [2021-06-05 13:52:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:48,234 INFO L482 AbstractCegarLoop]: Abstraction has 86321 states and 342642 transitions. [2021-06-05 13:52:48,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 86321 states and 342642 transitions. [2021-06-05 13:52:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:48,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:48,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:48,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 13:52:48,598 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:48,598 INFO L82 PathProgramCache]: Analyzing trace with hash -898121568, now seen corresponding path program 110 times [2021-06-05 13:52:48,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:48,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938187780] [2021-06-05 13:52:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:48,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:48,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938187780] [2021-06-05 13:52:48,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938187780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:48,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598135423] [2021-06-05 13:52:48,625 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 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 13:52:48,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:48,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:52:48,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:49,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598135423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:49,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:49,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:52:49,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165734092] [2021-06-05 13:52:49,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:49,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:49,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:49,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:49,062 INFO L87 Difference]: Start difference. First operand 86321 states and 342642 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:51,705 INFO L93 Difference]: Finished difference Result 126513 states and 485679 transitions. [2021-06-05 13:52:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 13:52:51,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:52,065 INFO L225 Difference]: With dead ends: 126513 [2021-06-05 13:52:52,065 INFO L226 Difference]: Without dead ends: 126455 [2021-06-05 13:52:52,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 1514.4ms TimeCoverageRelationStatistics Valid=1686, Invalid=6146, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 13:52:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126455 states. [2021-06-05 13:52:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126455 to 78711. [2021-06-05 13:52:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78711 states, 78710 states have (on average 3.963613263880066) internal successors, (311976), 78710 states have internal predecessors, (311976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78711 states to 78711 states and 311976 transitions. [2021-06-05 13:52:54,674 INFO L78 Accepts]: Start accepts. Automaton has 78711 states and 311976 transitions. Word has length 25 [2021-06-05 13:52:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:54,674 INFO L482 AbstractCegarLoop]: Abstraction has 78711 states and 311976 transitions. [2021-06-05 13:52:54,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 78711 states and 311976 transitions. [2021-06-05 13:52:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:54,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:54,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:55,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 13:52:55,030 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:55,031 INFO L82 PathProgramCache]: Analyzing trace with hash 369349092, now seen corresponding path program 111 times [2021-06-05 13:52:55,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:55,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777842570] [2021-06-05 13:52:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:55,067 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 13:52:55,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:55,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777842570] [2021-06-05 13:52:55,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777842570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:55,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024568646] [2021-06-05 13:52:55,067 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 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 13:52:55,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:52:55,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:55,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:52:55,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:55,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024568646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:55,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:55,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:52:55,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038551775] [2021-06-05 13:52:55,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:55,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:55,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:55,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:55,182 INFO L87 Difference]: Start difference. First operand 78711 states and 311976 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:56,332 INFO L93 Difference]: Finished difference Result 88246 states and 345409 transitions. [2021-06-05 13:52:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:52:56,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:52:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:56,560 INFO L225 Difference]: With dead ends: 88246 [2021-06-05 13:52:56,561 INFO L226 Difference]: Without dead ends: 88239 [2021-06-05 13:52:56,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:52:56,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88239 states. [2021-06-05 13:52:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88239 to 78612. [2021-06-05 13:52:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78612 states, 78611 states have (on average 3.9635801605373295) internal successors, (311581), 78611 states have internal predecessors, (311581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78612 states to 78612 states and 311581 transitions. [2021-06-05 13:52:58,339 INFO L78 Accepts]: Start accepts. Automaton has 78612 states and 311581 transitions. Word has length 25 [2021-06-05 13:52:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:58,339 INFO L482 AbstractCegarLoop]: Abstraction has 78612 states and 311581 transitions. [2021-06-05 13:52:58,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 78612 states and 311581 transitions. [2021-06-05 13:52:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 13:52:58,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:58,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:58,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 13:52:58,692 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash 24251820, now seen corresponding path program 112 times [2021-06-05 13:52:58,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:58,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048960226] [2021-06-05 13:52:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:58,765 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 13:52:58,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048960226] [2021-06-05 13:52:58,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048960226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:58,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110693375] [2021-06-05 13:52:58,766 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:52:58,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:58,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:52:58,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:58,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110693375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:58,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:58,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:52:58,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222803065] [2021-06-05 13:52:58,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:58,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:58,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:58,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:58,885 INFO L87 Difference]: Start difference. First operand 78612 states and 311581 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:00,914 INFO L93 Difference]: Finished difference Result 113139 states and 434013 transitions. [2021-06-05 13:53:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 13:53:00,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 13:53:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:01,267 INFO L225 Difference]: With dead ends: 113139 [2021-06-05 13:53:01,267 INFO L226 Difference]: Without dead ends: 113111 [2021-06-05 13:53:01,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 1111.8ms TimeCoverageRelationStatistics Valid=842, Invalid=3580, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 13:53:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113111 states. [2021-06-05 13:53:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113111 to 83397. [2021-06-05 13:53:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83397 states, 83396 states have (on average 3.962827953379059) internal successors, (330484), 83396 states have internal predecessors, (330484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83397 states to 83397 states and 330484 transitions. [2021-06-05 13:53:03,626 INFO L78 Accepts]: Start accepts. Automaton has 83397 states and 330484 transitions. Word has length 25 [2021-06-05 13:53:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:03,626 INFO L482 AbstractCegarLoop]: Abstraction has 83397 states and 330484 transitions. [2021-06-05 13:53:03,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 83397 states and 330484 transitions. [2021-06-05 13:53:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:03,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:03,788 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:03,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 13:53:03,993 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash -821290236, now seen corresponding path program 59 times [2021-06-05 13:53:03,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:03,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812489049] [2021-06-05 13:53:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:04,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812489049] [2021-06-05 13:53:04,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812489049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063419824] [2021-06-05 13:53:04,060 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 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 13:53:04,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:53:04,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:04,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:04,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063419824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:04,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:04,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 13:53:04,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725949026] [2021-06-05 13:53:04,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:53:04,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:04,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:53:04,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:53:04,211 INFO L87 Difference]: Start difference. First operand 83397 states and 330484 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:05,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:05,289 INFO L93 Difference]: Finished difference Result 103885 states and 410889 transitions. [2021-06-05 13:53:05,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:53:05,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:05,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:05,615 INFO L225 Difference]: With dead ends: 103885 [2021-06-05 13:53:05,615 INFO L226 Difference]: Without dead ends: 103855 [2021-06-05 13:53:05,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103855 states. [2021-06-05 13:53:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103855 to 101640. [2021-06-05 13:53:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101640 states, 101639 states have (on average 3.9752949163214906) internal successors, (404045), 101639 states have internal predecessors, (404045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101640 states to 101640 states and 404045 transitions. [2021-06-05 13:53:08,532 INFO L78 Accepts]: Start accepts. Automaton has 101640 states and 404045 transitions. Word has length 27 [2021-06-05 13:53:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:08,532 INFO L482 AbstractCegarLoop]: Abstraction has 101640 states and 404045 transitions. [2021-06-05 13:53:08,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 101640 states and 404045 transitions. [2021-06-05 13:53:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:08,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:08,730 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:08,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 13:53:08,946 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1228770302, now seen corresponding path program 60 times [2021-06-05 13:53:08,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:08,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363617856] [2021-06-05 13:53:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:09,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:09,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363617856] [2021-06-05 13:53:09,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363617856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:09,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184473844] [2021-06-05 13:53:09,033 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 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 13:53:09,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:53:09,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:09,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:09,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:09,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184473844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:09,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:09,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:53:09,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062419365] [2021-06-05 13:53:09,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:09,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:09,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:09,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:09,166 INFO L87 Difference]: Start difference. First operand 101640 states and 404045 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:10,292 INFO L93 Difference]: Finished difference Result 110527 states and 436932 transitions. [2021-06-05 13:53:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:53:10,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:10,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:10,628 INFO L225 Difference]: With dead ends: 110527 [2021-06-05 13:53:10,628 INFO L226 Difference]: Without dead ends: 110472 [2021-06-05 13:53:10,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:53:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110472 states. [2021-06-05 13:53:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110472 to 107889. [2021-06-05 13:53:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107889 states, 107888 states have (on average 3.973833975975085) internal successors, (428729), 107888 states have internal predecessors, (428729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107889 states to 107889 states and 428729 transitions. [2021-06-05 13:53:13,332 INFO L78 Accepts]: Start accepts. Automaton has 107889 states and 428729 transitions. Word has length 27 [2021-06-05 13:53:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:13,332 INFO L482 AbstractCegarLoop]: Abstraction has 107889 states and 428729 transitions. [2021-06-05 13:53:13,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 107889 states and 428729 transitions. [2021-06-05 13:53:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:13,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:13,545 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:13,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 13:53:13,745 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash -937524992, now seen corresponding path program 113 times [2021-06-05 13:53:13,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:13,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583917052] [2021-06-05 13:53:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:13,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:13,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583917052] [2021-06-05 13:53:13,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583917052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:13,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443023322] [2021-06-05 13:53:13,799 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 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 13:53:13,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:53:13,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:13,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443023322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:13,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:13,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:53:13,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780460186] [2021-06-05 13:53:13,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:53:13,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:53:13,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:13,927 INFO L87 Difference]: Start difference. First operand 107889 states and 428729 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:15,137 INFO L93 Difference]: Finished difference Result 109872 states and 435027 transitions. [2021-06-05 13:53:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:53:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:15,503 INFO L225 Difference]: With dead ends: 109872 [2021-06-05 13:53:15,503 INFO L226 Difference]: Without dead ends: 109783 [2021-06-05 13:53:15,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109783 states. [2021-06-05 13:53:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109783 to 108791. [2021-06-05 13:53:17,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108791 states, 108790 states have (on average 3.9699604743083006) internal successors, (431892), 108790 states have internal predecessors, (431892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108791 states to 108791 states and 431892 transitions. [2021-06-05 13:53:18,230 INFO L78 Accepts]: Start accepts. Automaton has 108791 states and 431892 transitions. Word has length 27 [2021-06-05 13:53:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:18,230 INFO L482 AbstractCegarLoop]: Abstraction has 108791 states and 431892 transitions. [2021-06-05 13:53:18,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 108791 states and 431892 transitions. [2021-06-05 13:53:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:18,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:18,461 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:18,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 13:53:18,661 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:18,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1974933008, now seen corresponding path program 114 times [2021-06-05 13:53:18,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:18,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425232866] [2021-06-05 13:53:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:18,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425232866] [2021-06-05 13:53:18,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425232866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496189794] [2021-06-05 13:53:18,723 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 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 13:53:18,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:53:18,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:18,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496189794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:18,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:18,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:53:18,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965448583] [2021-06-05 13:53:18,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:18,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:18,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:18,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:18,863 INFO L87 Difference]: Start difference. First operand 108791 states and 431892 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:20,104 INFO L93 Difference]: Finished difference Result 111202 states and 439400 transitions. [2021-06-05 13:53:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:53:20,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:20,439 INFO L225 Difference]: With dead ends: 111202 [2021-06-05 13:53:20,439 INFO L226 Difference]: Without dead ends: 111143 [2021-06-05 13:53:20,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:53:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111143 states. [2021-06-05 13:53:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111143 to 109527. [2021-06-05 13:53:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109527 states, 109526 states have (on average 3.965569819038402) internal successors, (434333), 109526 states have internal predecessors, (434333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109527 states to 109527 states and 434333 transitions. [2021-06-05 13:53:23,254 INFO L78 Accepts]: Start accepts. Automaton has 109527 states and 434333 transitions. Word has length 27 [2021-06-05 13:53:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:23,254 INFO L482 AbstractCegarLoop]: Abstraction has 109527 states and 434333 transitions. [2021-06-05 13:53:23,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 109527 states and 434333 transitions. [2021-06-05 13:53:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:23,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:23,481 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:23,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:23,682 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:23,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1998266096, now seen corresponding path program 115 times [2021-06-05 13:53:23,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:23,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067528541] [2021-06-05 13:53:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:23,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:23,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067528541] [2021-06-05 13:53:23,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067528541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:23,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66569934] [2021-06-05 13:53:23,745 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 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 13:53:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:23,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:23,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66569934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:23,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:23,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:53:23,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242114436] [2021-06-05 13:53:23,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:23,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:23,882 INFO L87 Difference]: Start difference. First operand 109527 states and 434333 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:25,075 INFO L93 Difference]: Finished difference Result 112734 states and 444886 transitions. [2021-06-05 13:53:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:53:25,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:25,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:25,429 INFO L225 Difference]: With dead ends: 112734 [2021-06-05 13:53:25,429 INFO L226 Difference]: Without dead ends: 112682 [2021-06-05 13:53:25,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:53:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112682 states. [2021-06-05 13:53:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112682 to 110080. [2021-06-05 13:53:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110080 states, 110079 states have (on average 3.9630447224266208) internal successors, (436248), 110079 states have internal predecessors, (436248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110080 states to 110080 states and 436248 transitions. [2021-06-05 13:53:28,249 INFO L78 Accepts]: Start accepts. Automaton has 110080 states and 436248 transitions. Word has length 27 [2021-06-05 13:53:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:28,249 INFO L482 AbstractCegarLoop]: Abstraction has 110080 states and 436248 transitions. [2021-06-05 13:53:28,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 110080 states and 436248 transitions. [2021-06-05 13:53:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:28,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:28,483 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:28,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:28,683 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:28,684 INFO L82 PathProgramCache]: Analyzing trace with hash -265247552, now seen corresponding path program 116 times [2021-06-05 13:53:28,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:28,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585701450] [2021-06-05 13:53:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:28,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:28,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585701450] [2021-06-05 13:53:28,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585701450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:28,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904425652] [2021-06-05 13:53:28,755 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 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 13:53:28,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:28,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:28,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:28,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904425652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:28,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:28,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:53:28,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734175323] [2021-06-05 13:53:28,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:28,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:28,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:28,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:28,932 INFO L87 Difference]: Start difference. First operand 110080 states and 436248 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:30,236 INFO L93 Difference]: Finished difference Result 111354 states and 440255 transitions. [2021-06-05 13:53:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:53:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:30,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:30,568 INFO L225 Difference]: With dead ends: 111354 [2021-06-05 13:53:30,568 INFO L226 Difference]: Without dead ends: 111324 [2021-06-05 13:53:30,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:53:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111324 states. [2021-06-05 13:53:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111324 to 110406. [2021-06-05 13:53:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110406 states, 110405 states have (on average 3.9620216475703094) internal successors, (437427), 110405 states have internal predecessors, (437427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110406 states to 110406 states and 437427 transitions. [2021-06-05 13:53:33,285 INFO L78 Accepts]: Start accepts. Automaton has 110406 states and 437427 transitions. Word has length 27 [2021-06-05 13:53:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:33,285 INFO L482 AbstractCegarLoop]: Abstraction has 110406 states and 437427 transitions. [2021-06-05 13:53:33,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 110406 states and 437427 transitions. [2021-06-05 13:53:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:33,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:33,511 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:33,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:33,712 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:33,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1302655568, now seen corresponding path program 117 times [2021-06-05 13:53:33,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:33,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191627241] [2021-06-05 13:53:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:33,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:33,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191627241] [2021-06-05 13:53:33,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191627241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:33,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499781819] [2021-06-05 13:53:33,780 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 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 13:53:33,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:53:33,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:33,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:33,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:33,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499781819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:33,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:33,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:53:33,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632293108] [2021-06-05 13:53:33,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:33,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:33,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:33,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:33,950 INFO L87 Difference]: Start difference. First operand 110406 states and 437427 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:35,200 INFO L93 Difference]: Finished difference Result 111948 states and 442166 transitions. [2021-06-05 13:53:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:53:35,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:35,578 INFO L225 Difference]: With dead ends: 111948 [2021-06-05 13:53:35,578 INFO L226 Difference]: Without dead ends: 111918 [2021-06-05 13:53:35,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:53:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111918 states. [2021-06-05 13:53:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111918 to 110463. [2021-06-05 13:53:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110463 states, 110462 states have (on average 3.9619416631963933) internal successors, (437644), 110462 states have internal predecessors, (437644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110463 states to 110463 states and 437644 transitions. [2021-06-05 13:53:38,393 INFO L78 Accepts]: Start accepts. Automaton has 110463 states and 437644 transitions. Word has length 27 [2021-06-05 13:53:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:38,393 INFO L482 AbstractCegarLoop]: Abstraction has 110463 states and 437644 transitions. [2021-06-05 13:53:38,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 110463 states and 437644 transitions. [2021-06-05 13:53:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:38,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:38,616 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:38,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 13:53:38,817 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:38,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1790561516, now seen corresponding path program 118 times [2021-06-05 13:53:38,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:38,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149287358] [2021-06-05 13:53:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:38,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:38,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149287358] [2021-06-05 13:53:38,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149287358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:38,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294567126] [2021-06-05 13:53:38,883 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 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 13:53:38,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:38,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:38,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:38,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:39,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294567126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:39,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:39,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:53:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081617310] [2021-06-05 13:53:39,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:39,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:39,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:39,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:39,035 INFO L87 Difference]: Start difference. First operand 110463 states and 437644 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:40,254 INFO L93 Difference]: Finished difference Result 112108 states and 442728 transitions. [2021-06-05 13:53:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:53:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:40,596 INFO L225 Difference]: With dead ends: 112108 [2021-06-05 13:53:40,596 INFO L226 Difference]: Without dead ends: 112078 [2021-06-05 13:53:40,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:53:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112078 states. [2021-06-05 13:53:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112078 to 110615. [2021-06-05 13:53:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110615 states, 110614 states have (on average 3.961180320755058) internal successors, (438162), 110614 states have internal predecessors, (438162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110615 states to 110615 states and 438162 transitions. [2021-06-05 13:53:43,430 INFO L78 Accepts]: Start accepts. Automaton has 110615 states and 438162 transitions. Word has length 27 [2021-06-05 13:53:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:43,430 INFO L482 AbstractCegarLoop]: Abstraction has 110615 states and 438162 transitions. [2021-06-05 13:53:43,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 110615 states and 438162 transitions. [2021-06-05 13:53:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:43,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:43,655 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:43,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:43,855 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:43,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:43,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1447877820, now seen corresponding path program 119 times [2021-06-05 13:53:43,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:43,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321728985] [2021-06-05 13:53:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:43,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:43,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321728985] [2021-06-05 13:53:43,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321728985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:43,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493060103] [2021-06-05 13:53:43,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:53:43,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:53:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:44,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493060103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:44,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:44,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:53:44,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681699954] [2021-06-05 13:53:44,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:53:44,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:44,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:53:44,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:44,040 INFO L87 Difference]: Start difference. First operand 110615 states and 438162 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:45,254 INFO L93 Difference]: Finished difference Result 112949 states and 445764 transitions. [2021-06-05 13:53:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:53:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:45,613 INFO L225 Difference]: With dead ends: 112949 [2021-06-05 13:53:45,613 INFO L226 Difference]: Without dead ends: 112905 [2021-06-05 13:53:45,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112905 states. [2021-06-05 13:53:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112905 to 110863. [2021-06-05 13:53:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110863 states, 110862 states have (on average 3.961492666558424) internal successors, (439179), 110862 states have internal predecessors, (439179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110863 states to 110863 states and 439179 transitions. [2021-06-05 13:53:48,484 INFO L78 Accepts]: Start accepts. Automaton has 110863 states and 439179 transitions. Word has length 27 [2021-06-05 13:53:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:48,484 INFO L482 AbstractCegarLoop]: Abstraction has 110863 states and 439179 transitions. [2021-06-05 13:53:48,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 110863 states and 439179 transitions. [2021-06-05 13:53:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:48,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:48,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:48,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 13:53:48,914 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:48,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1518602116, now seen corresponding path program 120 times [2021-06-05 13:53:48,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:48,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82411400] [2021-06-05 13:53:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:48,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:48,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82411400] [2021-06-05 13:53:48,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82411400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:48,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543189166] [2021-06-05 13:53:48,977 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 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 13:53:49,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:53:49,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:49,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:49,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:49,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543189166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:49,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:49,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:53:49,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955883678] [2021-06-05 13:53:49,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:49,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:49,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:49,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:49,109 INFO L87 Difference]: Start difference. First operand 110863 states and 439179 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:50,412 INFO L93 Difference]: Finished difference Result 113182 states and 446302 transitions. [2021-06-05 13:53:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:53:50,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:50,749 INFO L225 Difference]: With dead ends: 113182 [2021-06-05 13:53:50,749 INFO L226 Difference]: Without dead ends: 113094 [2021-06-05 13:53:50,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:53:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113094 states. [2021-06-05 13:53:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113094 to 111306. [2021-06-05 13:53:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111306 states, 111305 states have (on average 3.958106104847042) internal successors, (440557), 111305 states have internal predecessors, (440557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111306 states to 111306 states and 440557 transitions. [2021-06-05 13:53:53,598 INFO L78 Accepts]: Start accepts. Automaton has 111306 states and 440557 transitions. Word has length 27 [2021-06-05 13:53:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:53,598 INFO L482 AbstractCegarLoop]: Abstraction has 111306 states and 440557 transitions. [2021-06-05 13:53:53,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 111306 states and 440557 transitions. [2021-06-05 13:53:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:53,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:53,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:54,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 13:53:54,020 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:54,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1806423744, now seen corresponding path program 121 times [2021-06-05 13:53:54,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:54,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149322958] [2021-06-05 13:53:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:54,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:54,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149322958] [2021-06-05 13:53:54,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149322958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:54,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029978167] [2021-06-05 13:53:54,081 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 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 13:53:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:54,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:54,648 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 13:53:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:54,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029978167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:54,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:54,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:53:54,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14397550] [2021-06-05 13:53:54,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:54,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:54,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:54,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:54,660 INFO L87 Difference]: Start difference. First operand 111306 states and 440557 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:55,943 INFO L93 Difference]: Finished difference Result 114026 states and 448982 transitions. [2021-06-05 13:53:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:53:55,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:53:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:56,375 INFO L225 Difference]: With dead ends: 114026 [2021-06-05 13:53:56,375 INFO L226 Difference]: Without dead ends: 113946 [2021-06-05 13:53:56,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:53:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113946 states. [2021-06-05 13:53:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113946 to 111604. [2021-06-05 13:53:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111604 states, 111603 states have (on average 3.95698144315117) internal successors, (441611), 111603 states have internal predecessors, (441611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111604 states to 111604 states and 441611 transitions. [2021-06-05 13:53:59,204 INFO L78 Accepts]: Start accepts. Automaton has 111604 states and 441611 transitions. Word has length 27 [2021-06-05 13:53:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:59,204 INFO L482 AbstractCegarLoop]: Abstraction has 111604 states and 441611 transitions. [2021-06-05 13:53:59,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 111604 states and 441611 transitions. [2021-06-05 13:53:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:53:59,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:59,415 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:59,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:59,615 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1700606980, now seen corresponding path program 122 times [2021-06-05 13:53:59,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:59,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898849622] [2021-06-05 13:53:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:59,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:59,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898849622] [2021-06-05 13:53:59,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898849622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:59,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105428222] [2021-06-05 13:53:59,670 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 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 13:53:59,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:59,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:53:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:59,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105428222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:59,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:59,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:53:59,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473703408] [2021-06-05 13:53:59,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:53:59,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:59,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:53:59,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:53:59,799 INFO L87 Difference]: Start difference. First operand 111604 states and 441611 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:00,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:00,944 INFO L93 Difference]: Finished difference Result 115450 states and 454078 transitions. [2021-06-05 13:54:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:54:00,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:54:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:01,288 INFO L225 Difference]: With dead ends: 115450 [2021-06-05 13:54:01,288 INFO L226 Difference]: Without dead ends: 115391 [2021-06-05 13:54:01,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115391 states. [2021-06-05 13:54:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115391 to 112484. [2021-06-05 13:54:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112484 states, 112483 states have (on average 3.953957486909133) internal successors, (444753), 112483 states have internal predecessors, (444753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112484 states to 112484 states and 444753 transitions. [2021-06-05 13:54:03,997 INFO L78 Accepts]: Start accepts. Automaton has 112484 states and 444753 transitions. Word has length 27 [2021-06-05 13:54:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:03,997 INFO L482 AbstractCegarLoop]: Abstraction has 112484 states and 444753 transitions. [2021-06-05 13:54:03,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 112484 states and 444753 transitions. [2021-06-05 13:54:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:04,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:04,224 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:04,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:04,425 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1221364454, now seen corresponding path program 61 times [2021-06-05 13:54:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:04,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975951934] [2021-06-05 13:54:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:04,481 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 13:54:04,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:04,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975951934] [2021-06-05 13:54:04,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975951934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168660264] [2021-06-05 13:54:04,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:04,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:54:04,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:04,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168660264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:04,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-06-05 13:54:04,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270542384] [2021-06-05 13:54:04,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:54:04,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:04,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:54:04,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:04,618 INFO L87 Difference]: Start difference. First operand 112484 states and 444753 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:06,038 INFO L93 Difference]: Finished difference Result 133803 states and 522611 transitions. [2021-06-05 13:54:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:54:06,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:06,443 INFO L225 Difference]: With dead ends: 133803 [2021-06-05 13:54:06,443 INFO L226 Difference]: Without dead ends: 133803 [2021-06-05 13:54:06,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:54:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133803 states. [2021-06-05 13:54:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133803 to 118275. [2021-06-05 13:54:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118275 states, 118274 states have (on average 3.955315623044794) internal successors, (467811), 118274 states have internal predecessors, (467811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118275 states to 118275 states and 467811 transitions. [2021-06-05 13:54:09,917 INFO L78 Accepts]: Start accepts. Automaton has 118275 states and 467811 transitions. Word has length 29 [2021-06-05 13:54:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:09,917 INFO L482 AbstractCegarLoop]: Abstraction has 118275 states and 467811 transitions. [2021-06-05 13:54:09,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 118275 states and 467811 transitions. [2021-06-05 13:54:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:10,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:10,233 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:10,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 13:54:10,445 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash -920591248, now seen corresponding path program 123 times [2021-06-05 13:54:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209902653] [2021-06-05 13:54:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:10,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:10,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209902653] [2021-06-05 13:54:10,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209902653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:10,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459605252] [2021-06-05 13:54:10,488 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 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 13:54:10,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:10,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:10,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:10,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459605252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:10,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:10,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:54:10,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465337282] [2021-06-05 13:54:10,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:10,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:10,645 INFO L87 Difference]: Start difference. First operand 118275 states and 467811 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:12,223 INFO L93 Difference]: Finished difference Result 129210 states and 506995 transitions. [2021-06-05 13:54:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:54:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:12,618 INFO L225 Difference]: With dead ends: 129210 [2021-06-05 13:54:12,618 INFO L226 Difference]: Without dead ends: 129203 [2021-06-05 13:54:12,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:54:12,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129203 states. [2021-06-05 13:54:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129203 to 118854. [2021-06-05 13:54:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118854 states, 118853 states have (on average 3.953606555997745) internal successors, (469898), 118853 states have internal predecessors, (469898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118854 states to 118854 states and 469898 transitions. [2021-06-05 13:54:15,523 INFO L78 Accepts]: Start accepts. Automaton has 118854 states and 469898 transitions. Word has length 29 [2021-06-05 13:54:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:15,523 INFO L482 AbstractCegarLoop]: Abstraction has 118854 states and 469898 transitions. [2021-06-05 13:54:15,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:15,523 INFO L276 IsEmpty]: Start isEmpty. Operand 118854 states and 469898 transitions. [2021-06-05 13:54:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:15,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:15,757 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:15,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:15,958 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1451241570, now seen corresponding path program 62 times [2021-06-05 13:54:15,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:15,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214167327] [2021-06-05 13:54:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:16,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:16,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214167327] [2021-06-05 13:54:16,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214167327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:16,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406865665] [2021-06-05 13:54:16,005 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 13:54:16,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:16,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:16,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:54:16,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:16,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406865665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:16,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:16,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:54:16,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252949484] [2021-06-05 13:54:16,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:54:16,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:16,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:54:16,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:16,181 INFO L87 Difference]: Start difference. First operand 118854 states and 469898 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:17,784 INFO L93 Difference]: Finished difference Result 123992 states and 486316 transitions. [2021-06-05 13:54:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:54:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:18,147 INFO L225 Difference]: With dead ends: 123992 [2021-06-05 13:54:18,148 INFO L226 Difference]: Without dead ends: 123939 [2021-06-05 13:54:18,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 571.5ms TimeCoverageRelationStatistics Valid=410, Invalid=1846, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 13:54:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123939 states. [2021-06-05 13:54:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123939 to 119042. [2021-06-05 13:54:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119042 states, 119041 states have (on average 3.9531253937718938) internal successors, (470584), 119041 states have internal predecessors, (470584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119042 states to 119042 states and 470584 transitions. [2021-06-05 13:54:21,025 INFO L78 Accepts]: Start accepts. Automaton has 119042 states and 470584 transitions. Word has length 29 [2021-06-05 13:54:21,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:21,025 INFO L482 AbstractCegarLoop]: Abstraction has 119042 states and 470584 transitions. [2021-06-05 13:54:21,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:21,025 INFO L276 IsEmpty]: Start isEmpty. Operand 119042 states and 470584 transitions. [2021-06-05 13:54:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:21,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:21,747 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:21,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2021-06-05 13:54:21,961 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:21,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:21,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1329566750, now seen corresponding path program 63 times [2021-06-05 13:54:21,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:21,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867307756] [2021-06-05 13:54:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:22,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:22,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867307756] [2021-06-05 13:54:22,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867307756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:22,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059564734] [2021-06-05 13:54:22,004 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 13:54:22,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:22,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:22,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:54:22,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:22,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059564734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:22,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:22,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:54:22,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533699267] [2021-06-05 13:54:22,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:54:22,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:54:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:22,167 INFO L87 Difference]: Start difference. First operand 119042 states and 470584 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:24,570 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 13:54:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:26,816 INFO L93 Difference]: Finished difference Result 146231 states and 560780 transitions. [2021-06-05 13:54:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-06-05 13:54:26,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:27,236 INFO L225 Difference]: With dead ends: 146231 [2021-06-05 13:54:27,236 INFO L226 Difference]: Without dead ends: 146231 [2021-06-05 13:54:27,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12572 ImplicationChecksByTransitivity, 3184.4ms TimeCoverageRelationStatistics Valid=6926, Invalid=21466, Unknown=0, NotChecked=0, Total=28392 [2021-06-05 13:54:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146231 states. [2021-06-05 13:54:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146231 to 126560. [2021-06-05 13:54:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126560 states, 126559 states have (on average 3.9548669000229144) internal successors, (500524), 126559 states have internal predecessors, (500524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126560 states to 126560 states and 500524 transitions. [2021-06-05 13:54:31,210 INFO L78 Accepts]: Start accepts. Automaton has 126560 states and 500524 transitions. Word has length 29 [2021-06-05 13:54:31,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:31,211 INFO L482 AbstractCegarLoop]: Abstraction has 126560 states and 500524 transitions. [2021-06-05 13:54:31,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 126560 states and 500524 transitions. [2021-06-05 13:54:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:31,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:31,458 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:31,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:31,658 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash -82100962, now seen corresponding path program 124 times [2021-06-05 13:54:31,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:31,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699394732] [2021-06-05 13:54:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:31,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:31,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699394732] [2021-06-05 13:54:31,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699394732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:31,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592333666] [2021-06-05 13:54:31,696 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 13:54:31,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:31,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:31,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:31,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:31,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592333666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:31,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:31,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:54:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140165954] [2021-06-05 13:54:31,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:31,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:31,850 INFO L87 Difference]: Start difference. First operand 126560 states and 500524 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:33,580 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 13:54:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:35,627 INFO L93 Difference]: Finished difference Result 215685 states and 826250 transitions. [2021-06-05 13:54:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 13:54:35,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:36,293 INFO L225 Difference]: With dead ends: 215685 [2021-06-05 13:54:36,293 INFO L226 Difference]: Without dead ends: 215673 [2021-06-05 13:54:36,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 1821.0ms TimeCoverageRelationStatistics Valid=2399, Invalid=10941, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 13:54:36,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215673 states. [2021-06-05 13:54:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215673 to 165626. [2021-06-05 13:54:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165626 states, 165625 states have (on average 3.9928030188679244) internal successors, (661308), 165625 states have internal predecessors, (661308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165626 states to 165626 states and 661308 transitions. [2021-06-05 13:54:41,636 INFO L78 Accepts]: Start accepts. Automaton has 165626 states and 661308 transitions. Word has length 29 [2021-06-05 13:54:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:41,636 INFO L482 AbstractCegarLoop]: Abstraction has 165626 states and 661308 transitions. [2021-06-05 13:54:41,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 165626 states and 661308 transitions. [2021-06-05 13:54:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:41,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:41,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:42,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:42,186 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 896456482, now seen corresponding path program 125 times [2021-06-05 13:54:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:42,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180229446] [2021-06-05 13:54:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:42,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:42,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180229446] [2021-06-05 13:54:42,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180229446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:42,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481197523] [2021-06-05 13:54:42,240 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 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 13:54:42,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:42,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:42,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:42,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481197523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:42,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:42,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:54:42,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830268025] [2021-06-05 13:54:42,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:42,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:42,398 INFO L87 Difference]: Start difference. First operand 165626 states and 661308 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:46,216 INFO L93 Difference]: Finished difference Result 240162 states and 908189 transitions. [2021-06-05 13:54:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 13:54:46,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:46,949 INFO L225 Difference]: With dead ends: 240162 [2021-06-05 13:54:46,950 INFO L226 Difference]: Without dead ends: 240155 [2021-06-05 13:54:46,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 1394.3ms TimeCoverageRelationStatistics Valid=1955, Invalid=7747, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 13:54:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240155 states. [2021-06-05 13:54:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240155 to 142026. [2021-06-05 13:54:51,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142026 states, 142025 states have (on average 3.974328463298715) internal successors, (564454), 142025 states have internal predecessors, (564454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142026 states to 142026 states and 564454 transitions. [2021-06-05 13:54:52,272 INFO L78 Accepts]: Start accepts. Automaton has 142026 states and 564454 transitions. Word has length 29 [2021-06-05 13:54:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:52,272 INFO L482 AbstractCegarLoop]: Abstraction has 142026 states and 564454 transitions. [2021-06-05 13:54:52,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 142026 states and 564454 transitions. [2021-06-05 13:54:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:52,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:52,556 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:52,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:52,759 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:52,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1202691102, now seen corresponding path program 64 times [2021-06-05 13:54:52,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:52,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935472088] [2021-06-05 13:54:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:52,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:52,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935472088] [2021-06-05 13:54:52,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935472088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122202378] [2021-06-05 13:54:52,802 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 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 13:54:52,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:54:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:52,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122202378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:52,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:54:52,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312708529] [2021-06-05 13:54:52,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:54:52,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:52,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:54:52,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:52,969 INFO L87 Difference]: Start difference. First operand 142026 states and 564454 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:56,598 INFO L93 Difference]: Finished difference Result 157218 states and 610711 transitions. [2021-06-05 13:54:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 13:54:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:57,133 INFO L225 Difference]: With dead ends: 157218 [2021-06-05 13:54:57,134 INFO L226 Difference]: Without dead ends: 157183 [2021-06-05 13:54:57,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 1839.3ms TimeCoverageRelationStatistics Valid=3281, Invalid=9601, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 13:54:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157183 states. [2021-06-05 13:55:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157183 to 141438. [2021-06-05 13:55:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141438 states, 141437 states have (on average 3.9775589131556806) internal successors, (562574), 141437 states have internal predecessors, (562574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141438 states to 141438 states and 562574 transitions. [2021-06-05 13:55:01,182 INFO L78 Accepts]: Start accepts. Automaton has 141438 states and 562574 transitions. Word has length 29 [2021-06-05 13:55:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:01,182 INFO L482 AbstractCegarLoop]: Abstraction has 141438 states and 562574 transitions. [2021-06-05 13:55:01,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 141438 states and 562574 transitions. [2021-06-05 13:55:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:55:01,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:01,464 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:01,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 13:55:01,666 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash -633583326, now seen corresponding path program 65 times [2021-06-05 13:55:01,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:01,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268503000] [2021-06-05 13:55:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:01,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:01,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268503000] [2021-06-05 13:55:01,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268503000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496894221] [2021-06-05 13:55:01,710 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 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 13:55:02,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:55:02,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:02,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:02,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:02,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496894221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:02,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:02,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:55:02,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037896537] [2021-06-05 13:55:02,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:55:02,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:02,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:55:02,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:55:02,580 INFO L87 Difference]: Start difference. First operand 141438 states and 562574 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:05,502 INFO L93 Difference]: Finished difference Result 156501 states and 608867 transitions. [2021-06-05 13:55:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 13:55:05,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:55:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:05,985 INFO L225 Difference]: With dead ends: 156501 [2021-06-05 13:55:05,985 INFO L226 Difference]: Without dead ends: 156417 [2021-06-05 13:55:05,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3426 ImplicationChecksByTransitivity, 1658.3ms TimeCoverageRelationStatistics Valid=2343, Invalid=7163, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 13:55:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156417 states. [2021-06-05 13:55:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156417 to 141164. [2021-06-05 13:55:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141164 states, 141163 states have (on average 3.97604188066278) internal successors, (561270), 141163 states have internal predecessors, (561270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141164 states to 141164 states and 561270 transitions. [2021-06-05 13:55:10,338 INFO L78 Accepts]: Start accepts. Automaton has 141164 states and 561270 transitions. Word has length 29 [2021-06-05 13:55:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:10,338 INFO L482 AbstractCegarLoop]: Abstraction has 141164 states and 561270 transitions. [2021-06-05 13:55:10,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 141164 states and 561270 transitions. [2021-06-05 13:55:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:55:11,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:11,184 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:11,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 13:55:11,400 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:11,400 INFO L82 PathProgramCache]: Analyzing trace with hash 22459578, now seen corresponding path program 126 times [2021-06-05 13:55:11,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:11,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366199671] [2021-06-05 13:55:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:11,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:11,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366199671] [2021-06-05 13:55:11,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366199671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:11,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476437677] [2021-06-05 13:55:11,439 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 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 13:55:11,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:55:11,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:11,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:11,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:11,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476437677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:11,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:11,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 13:55:11,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353660164] [2021-06-05 13:55:11,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:55:11,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:11,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:55:11,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:55:11,587 INFO L87 Difference]: Start difference. First operand 141164 states and 561270 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:14,928 INFO L93 Difference]: Finished difference Result 203541 states and 778217 transitions. [2021-06-05 13:55:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 13:55:14,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:55:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:15,624 INFO L225 Difference]: With dead ends: 203541 [2021-06-05 13:55:15,625 INFO L226 Difference]: Without dead ends: 203513 [2021-06-05 13:55:15,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4280 ImplicationChecksByTransitivity, 1451.4ms TimeCoverageRelationStatistics Valid=2112, Invalid=9444, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 13:55:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203513 states. [2021-06-05 13:55:19,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203513 to 145059. [2021-06-05 13:55:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145059 states, 145058 states have (on average 3.9755890747149416) internal successors, (576691), 145058 states have internal predecessors, (576691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145059 states to 145059 states and 576691 transitions. [2021-06-05 13:55:20,522 INFO L78 Accepts]: Start accepts. Automaton has 145059 states and 576691 transitions. Word has length 29 [2021-06-05 13:55:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:20,522 INFO L482 AbstractCegarLoop]: Abstraction has 145059 states and 576691 transitions. [2021-06-05 13:55:20,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 145059 states and 576691 transitions. [2021-06-05 13:55:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:55:20,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:20,831 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:21,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 13:55:21,031 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:21,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1855414306, now seen corresponding path program 66 times [2021-06-05 13:55:21,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:21,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101282077] [2021-06-05 13:55:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:21,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:21,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101282077] [2021-06-05 13:55:21,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101282077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:21,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42751092] [2021-06-05 13:55:21,078 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 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 13:55:21,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:21,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:21,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:21,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:21,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42751092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:21,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:21,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:55:21,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091396832] [2021-06-05 13:55:21,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:55:21,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:21,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:55:21,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:55:21,262 INFO L87 Difference]: Start difference. First operand 145059 states and 576691 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:24,188 INFO L93 Difference]: Finished difference Result 161332 states and 627053 transitions. [2021-06-05 13:55:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 13:55:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:55:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:24,691 INFO L225 Difference]: With dead ends: 161332 [2021-06-05 13:55:24,691 INFO L226 Difference]: Without dead ends: 161227 [2021-06-05 13:55:24,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1375.2ms TimeCoverageRelationStatistics Valid=1982, Invalid=6390, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 13:55:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161227 states. [2021-06-05 13:55:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161227 to 146230. [2021-06-05 13:55:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146230 states, 146229 states have (on average 3.967995404468334) internal successors, (580236), 146229 states have internal predecessors, (580236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146230 states to 146230 states and 580236 transitions. [2021-06-05 13:55:29,468 INFO L78 Accepts]: Start accepts. Automaton has 146230 states and 580236 transitions. Word has length 29 [2021-06-05 13:55:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:29,468 INFO L482 AbstractCegarLoop]: Abstraction has 146230 states and 580236 transitions. [2021-06-05 13:55:29,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 146230 states and 580236 transitions. [2021-06-05 13:55:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:55:29,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:29,792 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:29,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 13:55:29,997 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:29,997 INFO L82 PathProgramCache]: Analyzing trace with hash -700559262, now seen corresponding path program 67 times [2021-06-05 13:55:29,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:29,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900683588] [2021-06-05 13:55:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:30,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:30,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900683588] [2021-06-05 13:55:30,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900683588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:30,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186832751] [2021-06-05 13:55:30,051 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:30,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:30,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:30,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186832751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:30,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:30,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:55:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897257226] [2021-06-05 13:55:30,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:55:30,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:55:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:55:30,250 INFO L87 Difference]: Start difference. First operand 146230 states and 580236 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:32,242 INFO L93 Difference]: Finished difference Result 151525 states and 597028 transitions. [2021-06-05 13:55:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 13:55:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:55:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:32,715 INFO L225 Difference]: With dead ends: 151525 [2021-06-05 13:55:32,715 INFO L226 Difference]: Without dead ends: 151472 [2021-06-05 13:55:32,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 726.9ms TimeCoverageRelationStatistics Valid=513, Invalid=2243, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 13:55:32,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151472 states. [2021-06-05 13:55:36,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151472 to 147173. [2021-06-05 13:55:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147173 states, 147172 states have (on average 3.964599244421493) internal successors, (583478), 147172 states have internal predecessors, (583478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147173 states to 147173 states and 583478 transitions. [2021-06-05 13:55:36,819 INFO L78 Accepts]: Start accepts. Automaton has 147173 states and 583478 transitions. Word has length 29 [2021-06-05 13:55:36,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:36,819 INFO L482 AbstractCegarLoop]: Abstraction has 147173 states and 583478 transitions. [2021-06-05 13:55:36,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 147173 states and 583478 transitions. [2021-06-05 13:55:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:55:37,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:37,149 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:37,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 13:55:37,349 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:37,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2140543774, now seen corresponding path program 68 times [2021-06-05 13:55:37,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:37,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709000310] [2021-06-05 13:55:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:37,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:37,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709000310] [2021-06-05 13:55:37,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709000310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029358980] [2021-06-05 13:55:37,396 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:37,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:37,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:37,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:37,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:37,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029358980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:37,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:37,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:55:37,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238023930] [2021-06-05 13:55:37,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:55:37,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:37,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:55:37,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:55:37,579 INFO L87 Difference]: Start difference. First operand 147173 states and 583478 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:38,473 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 13:55:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:40,030 INFO L93 Difference]: Finished difference Result 154103 states and 604819 transitions. [2021-06-05 13:55:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 13:55:40,031 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:55:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:40,833 INFO L225 Difference]: With dead ends: 154103 [2021-06-05 13:55:40,834 INFO L226 Difference]: Without dead ends: 153998 [2021-06-05 13:55:40,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 1551.9ms TimeCoverageRelationStatistics Valid=863, Invalid=3693, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 13:55:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153998 states. [2021-06-05 13:55:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153998 to 148515. [2021-06-05 13:55:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148515 states, 148514 states have (on average 3.9585964959532434) internal successors, (587907), 148514 states have internal predecessors, (587907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148515 states to 148515 states and 587907 transitions. [2021-06-05 13:55:44,998 INFO L78 Accepts]: Start accepts. Automaton has 148515 states and 587907 transitions. Word has length 29 [2021-06-05 13:55:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:44,998 INFO L482 AbstractCegarLoop]: Abstraction has 148515 states and 587907 transitions. [2021-06-05 13:55:44,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 148515 states and 587907 transitions. [2021-06-05 13:55:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:55:45,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:45,324 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:45,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:45,529 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:45,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1344516894, now seen corresponding path program 69 times [2021-06-05 13:55:45,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:45,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383625947] [2021-06-05 13:55:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:45,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:45,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383625947] [2021-06-05 13:55:45,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383625947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:45,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959967606] [2021-06-05 13:55:45,573 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:45,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:55:45,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:45,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:45,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959967606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:45,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:45,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:55:45,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216753978] [2021-06-05 13:55:45,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:55:45,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:45,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:55:45,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:55:45,764 INFO L87 Difference]: Start difference. First operand 148515 states and 587907 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:47,490 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-06-05 13:55:48,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:48,449 INFO L93 Difference]: Finished difference Result 155552 states and 609206 transitions. [2021-06-05 13:55:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 13:55:48,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:55:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:48,933 INFO L225 Difference]: With dead ends: 155552 [2021-06-05 13:55:48,933 INFO L226 Difference]: Without dead ends: 155468 [2021-06-05 13:55:48,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 1715.1ms TimeCoverageRelationStatistics Valid=1153, Invalid=4699, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 13:55:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155468 states. [2021-06-05 13:55:52,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155468 to 149643. [2021-06-05 13:55:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149643 states, 149642 states have (on average 3.9557878135817486) internal successors, (591952), 149642 states have internal predecessors, (591952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149643 states to 149643 states and 591952 transitions. [2021-06-05 13:55:53,424 INFO L78 Accepts]: Start accepts. Automaton has 149643 states and 591952 transitions. Word has length 29 [2021-06-05 13:55:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:53,425 INFO L482 AbstractCegarLoop]: Abstraction has 149643 states and 591952 transitions. [2021-06-05 13:55:53,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 149643 states and 591952 transitions. [2021-06-05 13:55:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:55:54,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:54,214 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:54,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:54,429 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1757983970, now seen corresponding path program 70 times [2021-06-05 13:55:54,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:54,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198545825] [2021-06-05 13:55:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:54,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:54,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198545825] [2021-06-05 13:55:54,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198545825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:54,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377531368] [2021-06-05 13:55:54,473 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:54,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:54,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:54,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:54,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:54,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377531368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:54,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:54,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:55:54,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097139550] [2021-06-05 13:55:54,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:55:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:54,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:55:54,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:55:54,657 INFO L87 Difference]: Start difference. First operand 149643 states and 591952 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:57,523 INFO L93 Difference]: Finished difference Result 157140 states and 613926 transitions. [2021-06-05 13:55:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 13:55:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:55:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:57,997 INFO L225 Difference]: With dead ends: 157140 [2021-06-05 13:55:57,998 INFO L226 Difference]: Without dead ends: 157105 [2021-06-05 13:55:57,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 1695.2ms TimeCoverageRelationStatistics Valid=1741, Invalid=6631, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 13:55:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157105 states. [2021-06-05 13:56:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157105 to 150750. [2021-06-05 13:56:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150750 states, 150749 states have (on average 3.9515950354562883) internal successors, (595699), 150749 states have internal predecessors, (595699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150750 states to 150750 states and 595699 transitions. [2021-06-05 13:56:01,938 INFO L78 Accepts]: Start accepts. Automaton has 150750 states and 595699 transitions. Word has length 29 [2021-06-05 13:56:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:01,938 INFO L482 AbstractCegarLoop]: Abstraction has 150750 states and 595699 transitions. [2021-06-05 13:56:01,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 150750 states and 595699 transitions. [2021-06-05 13:56:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:56:02,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:02,774 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:02,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:02,974 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:02,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:02,974 INFO L82 PathProgramCache]: Analyzing trace with hash -653389278, now seen corresponding path program 71 times [2021-06-05 13:56:02,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:02,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134216835] [2021-06-05 13:56:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:03,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:03,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134216835] [2021-06-05 13:56:03,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134216835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997240287] [2021-06-05 13:56:03,019 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:03,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:03,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:03,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:03,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:03,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997240287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:03,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 13:56:03,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452275965] [2021-06-05 13:56:03,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:56:03,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:03,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:56:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:03,200 INFO L87 Difference]: Start difference. First operand 150750 states and 595699 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:05,688 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-06-05 13:56:06,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:06,612 INFO L93 Difference]: Finished difference Result 158393 states and 617275 transitions. [2021-06-05 13:56:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 13:56:06,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:56:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:07,111 INFO L225 Difference]: With dead ends: 158393 [2021-06-05 13:56:07,111 INFO L226 Difference]: Without dead ends: 158357 [2021-06-05 13:56:07,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5584 ImplicationChecksByTransitivity, 2343.0ms TimeCoverageRelationStatistics Valid=2966, Invalid=10840, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 13:56:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158357 states. [2021-06-05 13:56:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158357 to 150441. [2021-06-05 13:56:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150441 states, 150440 states have (on average 3.9519210316405213) internal successors, (594527), 150440 states have internal predecessors, (594527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150441 states to 150441 states and 594527 transitions. [2021-06-05 13:56:11,034 INFO L78 Accepts]: Start accepts. Automaton has 150441 states and 594527 transitions. Word has length 29 [2021-06-05 13:56:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:11,034 INFO L482 AbstractCegarLoop]: Abstraction has 150441 states and 594527 transitions. [2021-06-05 13:56:11,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 150441 states and 594527 transitions. [2021-06-05 13:56:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:56:11,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:11,857 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:12,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2021-06-05 13:56:12,073 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:12,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1949470182, now seen corresponding path program 72 times [2021-06-05 13:56:12,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:12,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356523035] [2021-06-05 13:56:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:12,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:12,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356523035] [2021-06-05 13:56:12,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356523035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797300981] [2021-06-05 13:56:12,122 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:12,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:56:12,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:12,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 13:56:12,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:12,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797300981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:12,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-06-05 13:56:12,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264461082] [2021-06-05 13:56:12,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:12,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:12,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:12,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:12,219 INFO L87 Difference]: Start difference. First operand 150441 states and 594527 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:13,772 INFO L93 Difference]: Finished difference Result 166950 states and 644337 transitions. [2021-06-05 13:56:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:56:13,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:56:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:14,237 INFO L225 Difference]: With dead ends: 166950 [2021-06-05 13:56:14,237 INFO L226 Difference]: Without dead ends: 166942 [2021-06-05 13:56:14,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:56:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166942 states. [2021-06-05 13:56:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166942 to 145057. [2021-06-05 13:56:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145057 states, 145056 states have (on average 3.9473996249724244) internal successors, (572594), 145056 states have internal predecessors, (572594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145057 states to 145057 states and 572594 transitions. [2021-06-05 13:56:18,369 INFO L78 Accepts]: Start accepts. Automaton has 145057 states and 572594 transitions. Word has length 29 [2021-06-05 13:56:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:18,369 INFO L482 AbstractCegarLoop]: Abstraction has 145057 states and 572594 transitions. [2021-06-05 13:56:18,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 145057 states and 572594 transitions. [2021-06-05 13:56:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:56:18,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:18,695 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:18,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:18,896 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:18,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1243295782, now seen corresponding path program 73 times [2021-06-05 13:56:18,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:18,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000797971] [2021-06-05 13:56:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:18,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:18,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000797971] [2021-06-05 13:56:18,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000797971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:18,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105231916] [2021-06-05 13:56:18,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:19,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105231916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:19,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:19,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 13:56:19,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144276153] [2021-06-05 13:56:19,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:19,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:19,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:19,079 INFO L87 Difference]: Start difference. First operand 145057 states and 572594 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:23,530 INFO L93 Difference]: Finished difference Result 176958 states and 686278 transitions. [2021-06-05 13:56:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 13:56:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:56:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:24,051 INFO L225 Difference]: With dead ends: 176958 [2021-06-05 13:56:24,052 INFO L226 Difference]: Without dead ends: 176958 [2021-06-05 13:56:24,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9643 ImplicationChecksByTransitivity, 2820.8ms TimeCoverageRelationStatistics Valid=5083, Invalid=17567, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 13:56:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176958 states. [2021-06-05 13:56:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176958 to 158688. [2021-06-05 13:56:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158688 states, 158687 states have (on average 3.9697580772211962) internal successors, (629949), 158687 states have internal predecessors, (629949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158688 states to 158688 states and 629949 transitions. [2021-06-05 13:56:28,990 INFO L78 Accepts]: Start accepts. Automaton has 158688 states and 629949 transitions. Word has length 29 [2021-06-05 13:56:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:28,990 INFO L482 AbstractCegarLoop]: Abstraction has 158688 states and 629949 transitions. [2021-06-05 13:56:28,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 158688 states and 629949 transitions. [2021-06-05 13:56:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:56:29,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:29,343 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:29,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 13:56:29,544 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:29,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1370171430, now seen corresponding path program 74 times [2021-06-05 13:56:29,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:29,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550394938] [2021-06-05 13:56:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:29,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:29,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550394938] [2021-06-05 13:56:29,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550394938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:29,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892191300] [2021-06-05 13:56:29,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:29,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:29,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:29,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:29,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892191300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:29,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:29,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 13:56:29,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886869958] [2021-06-05 13:56:29,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:29,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:29,734 INFO L87 Difference]: Start difference. First operand 158688 states and 629949 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:32,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:32,561 INFO L93 Difference]: Finished difference Result 172236 states and 671535 transitions. [2021-06-05 13:56:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 13:56:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:56:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:33,055 INFO L225 Difference]: With dead ends: 172236 [2021-06-05 13:56:33,055 INFO L226 Difference]: Without dead ends: 172201 [2021-06-05 13:56:33,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2769 ImplicationChecksByTransitivity, 1670.6ms TimeCoverageRelationStatistics Valid=1953, Invalid=5703, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 13:56:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172201 states. [2021-06-05 13:56:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172201 to 158676. [2021-06-05 13:56:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158676 states, 158675 states have (on average 3.969654955096896) internal successors, (629885), 158675 states have internal predecessors, (629885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158676 states to 158676 states and 629885 transitions. [2021-06-05 13:56:37,905 INFO L78 Accepts]: Start accepts. Automaton has 158676 states and 629885 transitions. Word has length 29 [2021-06-05 13:56:37,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:37,906 INFO L482 AbstractCegarLoop]: Abstraction has 158676 states and 629885 transitions. [2021-06-05 13:56:37,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 158676 states and 629885 transitions. [2021-06-05 13:56:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:56:38,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:38,239 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:38,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:38,449 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash -584718882, now seen corresponding path program 75 times [2021-06-05 13:56:38,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:38,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680958634] [2021-06-05 13:56:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:38,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:38,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680958634] [2021-06-05 13:56:38,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680958634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:38,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785096870] [2021-06-05 13:56:38,478 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:38,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:38,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:38,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785096870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:38,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:38,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 13:56:38,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392174169] [2021-06-05 13:56:38,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:38,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:38,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:38,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:38,635 INFO L87 Difference]: Start difference. First operand 158676 states and 629885 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:43,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:43,177 INFO L93 Difference]: Finished difference Result 196138 states and 746752 transitions. [2021-06-05 13:56:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-06-05 13:56:43,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:56:43,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:43,743 INFO L225 Difference]: With dead ends: 196138 [2021-06-05 13:56:43,743 INFO L226 Difference]: Without dead ends: 196138 [2021-06-05 13:56:43,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9744 ImplicationChecksByTransitivity, 2416.1ms TimeCoverageRelationStatistics Valid=5193, Invalid=18063, Unknown=0, NotChecked=0, Total=23256 [2021-06-05 13:56:44,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196138 states. [2021-06-05 13:56:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196138 to 158707. [2021-06-05 13:56:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158707 states, 158706 states have (on average 3.9700830466396986) internal successors, (630076), 158706 states have internal predecessors, (630076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158707 states to 158707 states and 630076 transitions. [2021-06-05 13:56:48,641 INFO L78 Accepts]: Start accepts. Automaton has 158707 states and 630076 transitions. Word has length 29 [2021-06-05 13:56:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:48,641 INFO L482 AbstractCegarLoop]: Abstraction has 158707 states and 630076 transitions. [2021-06-05 13:56:48,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 158707 states and 630076 transitions. [2021-06-05 13:56:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:56:48,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:48,981 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:49,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 13:56:49,181 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:49,182 INFO L82 PathProgramCache]: Analyzing trace with hash 451962842, now seen corresponding path program 76 times [2021-06-05 13:56:49,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:49,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781331641] [2021-06-05 13:56:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:49,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781331641] [2021-06-05 13:56:49,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781331641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:49,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812264311] [2021-06-05 13:56:49,815 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:56:49,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:49,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:50,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812264311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:50,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 13:56:50,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430704043] [2021-06-05 13:56:50,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:50,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:50,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:50,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:50,043 INFO L87 Difference]: Start difference. First operand 158707 states and 630076 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:53,660 INFO L93 Difference]: Finished difference Result 194195 states and 739818 transitions. [2021-06-05 13:56:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 13:56:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:56:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:54,239 INFO L225 Difference]: With dead ends: 194195 [2021-06-05 13:56:54,240 INFO L226 Difference]: Without dead ends: 194159 [2021-06-05 13:56:54,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5336 ImplicationChecksByTransitivity, 2495.2ms TimeCoverageRelationStatistics Valid=3514, Invalid=10528, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 13:56:54,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194159 states. [2021-06-05 13:56:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194159 to 159091. [2021-06-05 13:56:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159091 states, 159090 states have (on average 3.967075240429945) internal successors, (631122), 159090 states have internal predecessors, (631122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159091 states to 159091 states and 631122 transitions. [2021-06-05 13:56:59,144 INFO L78 Accepts]: Start accepts. Automaton has 159091 states and 631122 transitions. Word has length 29 [2021-06-05 13:56:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:59,144 INFO L482 AbstractCegarLoop]: Abstraction has 159091 states and 631122 transitions. [2021-06-05 13:56:59,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,144 INFO L276 IsEmpty]: Start isEmpty. Operand 159091 states and 631122 transitions. [2021-06-05 13:56:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:56:59,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:59,484 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:59,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:59,685 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash -96815142, now seen corresponding path program 77 times [2021-06-05 13:56:59,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:59,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688767870] [2021-06-05 13:56:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:59,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:59,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688767870] [2021-06-05 13:56:59,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688767870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122387667] [2021-06-05 13:56:59,717 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:59,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:56:59,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:56:59,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:59,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122387667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:59,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 13:56:59,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817946347] [2021-06-05 13:56:59,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:59,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:59,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:59,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:59,871 INFO L87 Difference]: Start difference. First operand 159091 states and 631122 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:03,042 INFO L93 Difference]: Finished difference Result 173840 states and 676439 transitions. [2021-06-05 13:57:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 13:57:03,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:57:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:03,526 INFO L225 Difference]: With dead ends: 173840 [2021-06-05 13:57:03,526 INFO L226 Difference]: Without dead ends: 173805 [2021-06-05 13:57:03,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2764 ImplicationChecksByTransitivity, 1716.8ms TimeCoverageRelationStatistics Valid=1953, Invalid=5703, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 13:57:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173805 states. [2021-06-05 13:57:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173805 to 159277. [2021-06-05 13:57:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159277 states, 159276 states have (on average 3.966837439413345) internal successors, (631822), 159276 states have internal predecessors, (631822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159277 states to 159277 states and 631822 transitions. [2021-06-05 13:57:07,829 INFO L78 Accepts]: Start accepts. Automaton has 159277 states and 631822 transitions. Word has length 29 [2021-06-05 13:57:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:07,829 INFO L482 AbstractCegarLoop]: Abstraction has 159277 states and 631822 transitions. [2021-06-05 13:57:07,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:07,830 INFO L276 IsEmpty]: Start isEmpty. Operand 159277 states and 631822 transitions. [2021-06-05 13:57:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:57:08,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:08,805 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:09,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 13:57:09,005 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1007779550, now seen corresponding path program 78 times [2021-06-05 13:57:09,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:09,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615638004] [2021-06-05 13:57:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:09,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:09,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615638004] [2021-06-05 13:57:09,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615638004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:09,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557411916] [2021-06-05 13:57:09,035 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:09,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:09,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:09,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:09,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:09,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557411916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:09,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:09,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 13:57:09,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856452170] [2021-06-05 13:57:09,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:57:09,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:57:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:09,189 INFO L87 Difference]: Start difference. First operand 159277 states and 631822 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 13:57:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 13:57:11,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 13:57:11,316 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 13:57:11,318 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:57:11,319 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 13:57:11,320 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:57:11 BasicIcfg [2021-06-05 13:57:11,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:57:11,320 INFO L168 Benchmark]: Toolchain (without parser) took 754747.67 ms. Allocated memory was 375.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 354.4 MB in the beginning and 12.1 GB in the end (delta: -11.8 GB). Peak memory consumption was 3.9 GB. Max. memory is 16.0 GB. [2021-06-05 13:57:11,320 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 375.4 MB. Free memory is still 355.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:57:11,320 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.99 ms. Allocated memory is still 375.4 MB. Free memory was 354.3 MB in the beginning and 352.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:57:11,320 INFO L168 Benchmark]: Boogie Preprocessor took 10.97 ms. Allocated memory is still 375.4 MB. Free memory was 352.9 MB in the beginning and 351.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:57:11,320 INFO L168 Benchmark]: RCFGBuilder took 186.26 ms. Allocated memory is still 375.4 MB. Free memory was 351.9 MB in the beginning and 339.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 13:57:11,320 INFO L168 Benchmark]: TraceAbstraction took 754528.38 ms. Allocated memory was 375.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 339.0 MB in the beginning and 12.1 GB in the end (delta: -11.8 GB). Peak memory consumption was 3.9 GB. Max. memory is 16.0 GB. [2021-06-05 13:57:11,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 375.4 MB. Free memory is still 355.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.99 ms. Allocated memory is still 375.4 MB. Free memory was 354.3 MB in the beginning and 352.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.97 ms. Allocated memory is still 375.4 MB. Free memory was 352.9 MB in the beginning and 351.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 186.26 ms. Allocated memory is still 375.4 MB. Free memory was 351.9 MB in the beginning and 339.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 754528.38 ms. Allocated memory was 375.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 339.0 MB in the beginning and 12.1 GB in the end (delta: -11.8 GB). Peak memory consumption was 3.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (159277states) and FLOYD_HOARE automaton (currently 95 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 99 known predicates. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (159277states) and FLOYD_HOARE automaton (currently 95 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 99 known predicates. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (159277states) and FLOYD_HOARE automaton (currently 95 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 99 known predicates. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (159277states) and FLOYD_HOARE automaton (currently 95 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 99 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 754461.6ms, OverallIterations: 271, TraceHistogramMax: 4, EmptinessCheckTime: 25945.1ms, AutomataDifference: 331925.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11463 SDtfs, 78568 SDslu, 94417 SDs, 0 SdLazy, 129535 SolverSat, 14698 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 58554.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17007 GetRequests, 4914 SyntacticMatches, 5 SemanticMatches, 12087 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246886 ImplicationChecksByTransitivity, 163460.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=165626occurred in iteration=254, InterpolantAutomatonStates: 10907, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 294726.6ms AutomataMinimizationTime, 270 MinimizatonAttempts, 2241933 StatesRemovedByMinimization, 270 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 774.4ms SsaConstructionTime, 2336.9ms SatisfiabilityAnalysisTime, 38666.7ms InterpolantComputationTime, 13052 NumberOfCodeBlocks, 13045 NumberOfCodeBlocksAsserted, 949 NumberOfCheckSat, 12518 ConstructedInterpolants, 0 QuantifiedInterpolants, 95412 SizeOfPredicates, 1485 NumberOfNonLiveVariables, 19154 ConjunctsInSsa, 2814 ConjunctsInUnsatCore, 534 InterpolantComputations, 8 PerfectInterpolantSequences, 2001/5805 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown