/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:32:56,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:32:56,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:32:56,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:32:56,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 20:32:56,491 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:32:56,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:32:56,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:32:56,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:32:56,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:32:56,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:32:56,492 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:32:56,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:32:56,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:32:56,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:32:56,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:32:56,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:32:56,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:32:56,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:32:56,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:32:56,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:32:56,758 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:32:56,766 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:32:56,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl [2021-05-21 20:32:56,767 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl' [2021-05-21 20:32:56,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:32:56,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:32:56,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:32:56,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:32:56,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:32:56,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/1) ... [2021-05-21 20:32:56,811 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/1) ... [2021-05-21 20:32:56,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:32:56,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:32:56,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:32:56,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:32:56,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/1) ... [2021-05-21 20:32:56,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/1) ... [2021-05-21 20:32:56,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/1) ... [2021-05-21 20:32:56,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/1) ... [2021-05-21 20:32:56,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/1) ... [2021-05-21 20:32:56,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/1) ... [2021-05-21 20:32:56,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/1) ... [2021-05-21 20:32:56,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:32:56,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:32:56,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:32:56,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:32:56,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (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 [2021-05-21 20:32:56,898 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:32:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:32:56,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:32:56,898 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:32:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:32:56,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:32:56,898 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:32:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:32:56,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:32:56,899 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:32:57,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:32:57,033 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 20:32:57,034 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:32:57 BoogieIcfgContainer [2021-05-21 20:32:57,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:32:57,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:32:57,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:32:57,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:32:57,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:32:56" (1/2) ... [2021-05-21 20:32:57,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab32e94 and model type mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:32:57, skipping insertion in model container [2021-05-21 20:32:57,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:32:57" (2/2) ... [2021-05-21 20:32:57,039 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.bpl [2021-05-21 20:32:57,043 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:32:57,043 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:32:57,043 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:32:57,043 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:32:57,082 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-21 20:32:57,096 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 20:32:57,125 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:32:57,125 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:32:57,126 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:32:57,126 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:32:57,126 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:32:57,126 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:32:57,126 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:32:57,126 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:32:57,148 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-05-21 20:32:57,171 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-21 20:32:57,177 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:57,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:32:57,178 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash -538755822, now seen corresponding path program 1 times [2021-05-21 20:32:57,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:57,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118846400] [2021-05-21 20:32:57,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:57,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:57,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118846400] [2021-05-21 20:32:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118846400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:32:57,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:32:57,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:32:57,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412033210] [2021-05-21 20:32:57,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:32:57,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:57,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:32:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:32:57,336 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:57,360 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-05-21 20:32:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:32:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-21 20:32:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:57,368 INFO L225 Difference]: With dead ends: 54 [2021-05-21 20:32:57,368 INFO L226 Difference]: Without dead ends: 47 [2021-05-21 20:32:57,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:32:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-21 20:32:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-05-21 20:32:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-05-21 20:32:57,401 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-05-21 20:32:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:57,402 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-05-21 20:32:57,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-05-21 20:32:57,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-21 20:32:57,404 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:57,404 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:32:57,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:32:57,404 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1263691540, now seen corresponding path program 1 times [2021-05-21 20:32:57,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:57,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487204484] [2021-05-21 20:32:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:57,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:57,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487204484] [2021-05-21 20:32:57,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487204484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:57,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661238485] [2021-05-21 20:32:57,534 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 [2021-05-21 20:32:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:32:57,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:57,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661238485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:57,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:57,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-21 20:32:57,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016725268] [2021-05-21 20:32:57,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:32:57,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:57,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:32:57,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:32:57,651 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:57,731 INFO L93 Difference]: Finished difference Result 65 states and 125 transitions. [2021-05-21 20:32:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:32:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-21 20:32:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:57,732 INFO L225 Difference]: With dead ends: 65 [2021-05-21 20:32:57,733 INFO L226 Difference]: Without dead ends: 47 [2021-05-21 20:32:57,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:32:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-21 20:32:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-05-21 20:32:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-05-21 20:32:57,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-05-21 20:32:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:57,737 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-05-21 20:32:57,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-05-21 20:32:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-21 20:32:57,738 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:57,738 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:32:57,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 20:32:57,956 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1006944620, now seen corresponding path program 1 times [2021-05-21 20:32:57,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:57,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431667679] [2021-05-21 20:32:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:58,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:58,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431667679] [2021-05-21 20:32:58,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431667679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:58,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564315364] [2021-05-21 20:32:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:58,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:32:58,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:58,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564315364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:58,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:58,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-21 20:32:58,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952969324] [2021-05-21 20:32:58,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:32:58,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:58,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:32:58,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:32:58,118 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-05-21 20:32:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:58,141 INFO L93 Difference]: Finished difference Result 52 states and 94 transitions. [2021-05-21 20:32:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:32:58,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 13 [2021-05-21 20:32:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:58,142 INFO L225 Difference]: With dead ends: 52 [2021-05-21 20:32:58,142 INFO L226 Difference]: Without dead ends: 39 [2021-05-21 20:32:58,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:32:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-21 20:32:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-21 20:32:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-05-21 20:32:58,145 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 13 [2021-05-21 20:32:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:58,145 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-05-21 20:32:58,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-05-21 20:32:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-05-21 20:32:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-21 20:32:58,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:58,146 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:32:58,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:58,364 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash 689628820, now seen corresponding path program 2 times [2021-05-21 20:32:58,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:58,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461737234] [2021-05-21 20:32:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:58,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:58,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461737234] [2021-05-21 20:32:58,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461737234] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:58,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799149644] [2021-05-21 20:32:58,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:58,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:32:58,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:58,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:32:58,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:58,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799149644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:58,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:58,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-21 20:32:58,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457112046] [2021-05-21 20:32:58,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:32:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:32:58,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:32:58,551 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:58,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:58,623 INFO L93 Difference]: Finished difference Result 64 states and 122 transitions. [2021-05-21 20:32:58,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:32:58,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-21 20:32:58,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:58,624 INFO L225 Difference]: With dead ends: 64 [2021-05-21 20:32:58,624 INFO L226 Difference]: Without dead ends: 53 [2021-05-21 20:32:58,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:32:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-21 20:32:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-05-21 20:32:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 89 transitions. [2021-05-21 20:32:58,627 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 89 transitions. Word has length 13 [2021-05-21 20:32:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:58,628 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 89 transitions. [2021-05-21 20:32:58,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 89 transitions. [2021-05-21 20:32:58,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:32:58,628 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:58,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:32:58,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:58,840 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:58,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1751181162, now seen corresponding path program 2 times [2021-05-21 20:32:58,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:58,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053665537] [2021-05-21 20:32:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:58,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:58,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053665537] [2021-05-21 20:32:58,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053665537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:58,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332108604] [2021-05-21 20:32:58,944 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:32:58,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:32:58,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:58,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:32:58,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:59,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332108604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:59,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:59,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:32:59,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921782244] [2021-05-21 20:32:59,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:32:59,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:59,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:32:59,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:32:59,059 INFO L87 Difference]: Start difference. First operand 47 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:59,200 INFO L93 Difference]: Finished difference Result 73 states and 140 transitions. [2021-05-21 20:32:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:32:59,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:32:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:59,204 INFO L225 Difference]: With dead ends: 73 [2021-05-21 20:32:59,204 INFO L226 Difference]: Without dead ends: 60 [2021-05-21 20:32:59,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:32:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-21 20:32:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-05-21 20:32:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 48 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2021-05-21 20:32:59,215 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 15 [2021-05-21 20:32:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:59,216 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2021-05-21 20:32:59,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2021-05-21 20:32:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:32:59,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:59,217 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:32:59,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:59,418 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:59,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:59,418 INFO L82 PathProgramCache]: Analyzing trace with hash 273149974, now seen corresponding path program 1 times [2021-05-21 20:32:59,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:59,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158391658] [2021-05-21 20:32:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:59,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:59,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158391658] [2021-05-21 20:32:59,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158391658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:59,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944929331] [2021-05-21 20:32:59,508 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 [2021-05-21 20:32:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:59,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:32:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:59,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944929331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:59,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:59,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:32:59,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699390143] [2021-05-21 20:32:59,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:32:59,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:59,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:32:59,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:32:59,772 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:59,905 INFO L93 Difference]: Finished difference Result 69 states and 126 transitions. [2021-05-21 20:32:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:32:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:32:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:59,906 INFO L225 Difference]: With dead ends: 69 [2021-05-21 20:32:59,906 INFO L226 Difference]: Without dead ends: 62 [2021-05-21 20:32:59,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:32:59,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-21 20:32:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-05-21 20:32:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 100 transitions. [2021-05-21 20:32:59,909 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 100 transitions. Word has length 15 [2021-05-21 20:32:59,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:59,909 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 100 transitions. [2021-05-21 20:32:59,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:32:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 100 transitions. [2021-05-21 20:32:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:32:59,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:59,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:00,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-21 20:33:00,121 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash -109570414, now seen corresponding path program 2 times [2021-05-21 20:33:00,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:00,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318663592] [2021-05-21 20:33:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:00,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:00,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318663592] [2021-05-21 20:33:00,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318663592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:00,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363476076] [2021-05-21 20:33:00,193 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 [2021-05-21 20:33:00,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:00,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:00,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:00,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363476076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:00,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:00,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:33:00,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770154576] [2021-05-21 20:33:00,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:00,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:00,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:00,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:00,403 INFO L87 Difference]: Start difference. First operand 53 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:00,514 INFO L93 Difference]: Finished difference Result 73 states and 134 transitions. [2021-05-21 20:33:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:33:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:00,515 INFO L225 Difference]: With dead ends: 73 [2021-05-21 20:33:00,515 INFO L226 Difference]: Without dead ends: 66 [2021-05-21 20:33:00,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-21 20:33:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-05-21 20:33:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 103 transitions. [2021-05-21 20:33:00,517 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 103 transitions. Word has length 15 [2021-05-21 20:33:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:00,517 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 103 transitions. [2021-05-21 20:33:00,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 103 transitions. [2021-05-21 20:33:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:00,518 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:00,518 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:00,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:00,733 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1969723414, now seen corresponding path program 3 times [2021-05-21 20:33:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:00,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102212315] [2021-05-21 20:33:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:00,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:00,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102212315] [2021-05-21 20:33:00,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102212315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:00,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009445239] [2021-05-21 20:33:00,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:00,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:33:00,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:00,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:01,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009445239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:01,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:01,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:33:01,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844836928] [2021-05-21 20:33:01,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:01,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:01,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:01,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:01,009 INFO L87 Difference]: Start difference. First operand 54 states and 103 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:01,176 INFO L93 Difference]: Finished difference Result 94 states and 172 transitions. [2021-05-21 20:33:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:01,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:33:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:01,177 INFO L225 Difference]: With dead ends: 94 [2021-05-21 20:33:01,177 INFO L226 Difference]: Without dead ends: 87 [2021-05-21 20:33:01,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-21 20:33:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-05-21 20:33:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-05-21 20:33:01,180 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-05-21 20:33:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:01,180 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-05-21 20:33:01,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-05-21 20:33:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:01,181 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:01,181 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:01,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:01,399 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:01,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1985184210, now seen corresponding path program 4 times [2021-05-21 20:33:01,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:01,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986394373] [2021-05-21 20:33:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:01,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:01,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986394373] [2021-05-21 20:33:01,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986394373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:01,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204844066] [2021-05-21 20:33:01,482 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:01,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:01,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:01,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:01,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204844066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:01,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:01,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:33:01,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276965460] [2021-05-21 20:33:01,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:01,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:01,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:01,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:01,674 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:01,811 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-05-21 20:33:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:01,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:33:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:01,812 INFO L225 Difference]: With dead ends: 81 [2021-05-21 20:33:01,812 INFO L226 Difference]: Without dead ends: 74 [2021-05-21 20:33:01,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-21 20:33:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-05-21 20:33:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-05-21 20:33:01,814 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-05-21 20:33:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:01,814 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-05-21 20:33:01,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-05-21 20:33:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:01,815 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:01,815 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:02,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-21 20:33:02,025 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:02,025 INFO L82 PathProgramCache]: Analyzing trace with hash 903122118, now seen corresponding path program 5 times [2021-05-21 20:33:02,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:02,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234616532] [2021-05-21 20:33:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:02,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:02,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234616532] [2021-05-21 20:33:02,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234616532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:02,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578244122] [2021-05-21 20:33:02,104 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:02,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:02,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:02,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:02,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:02,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578244122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:02,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:02,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:02,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964328828] [2021-05-21 20:33:02,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:02,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:02,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:02,245 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:02,335 INFO L93 Difference]: Finished difference Result 72 states and 135 transitions. [2021-05-21 20:33:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:02,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:02,335 INFO L225 Difference]: With dead ends: 72 [2021-05-21 20:33:02,336 INFO L226 Difference]: Without dead ends: 65 [2021-05-21 20:33:02,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-21 20:33:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-05-21 20:33:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-05-21 20:33:02,338 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-05-21 20:33:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:02,338 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-05-21 20:33:02,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-05-21 20:33:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:02,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:02,339 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:02,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:02,553 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1312551350, now seen corresponding path program 6 times [2021-05-21 20:33:02,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:02,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110073761] [2021-05-21 20:33:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:02,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:02,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110073761] [2021-05-21 20:33:02,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110073761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:02,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405803995] [2021-05-21 20:33:02,628 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 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 [2021-05-21 20:33:02,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:33:02,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:02,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:02,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:02,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405803995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:02,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:02,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:02,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956140147] [2021-05-21 20:33:02,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:02,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:02,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:02,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:02,786 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:02,901 INFO L93 Difference]: Finished difference Result 95 states and 176 transitions. [2021-05-21 20:33:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:02,901 INFO L225 Difference]: With dead ends: 95 [2021-05-21 20:33:02,901 INFO L226 Difference]: Without dead ends: 88 [2021-05-21 20:33:02,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-21 20:33:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-05-21 20:33:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-05-21 20:33:02,904 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-05-21 20:33:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:02,904 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-05-21 20:33:02,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-05-21 20:33:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:02,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:02,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:03,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:03,121 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1297090554, now seen corresponding path program 7 times [2021-05-21 20:33:03,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:03,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196235150] [2021-05-21 20:33:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:03,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:03,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196235150] [2021-05-21 20:33:03,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196235150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:03,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544391140] [2021-05-21 20:33:03,187 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 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 [2021-05-21 20:33:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:03,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:03,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544391140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:03,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:03,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:03,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369672504] [2021-05-21 20:33:03,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:03,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:03,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:03,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:03,328 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:03,474 INFO L93 Difference]: Finished difference Result 82 states and 158 transitions. [2021-05-21 20:33:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:03,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:03,475 INFO L225 Difference]: With dead ends: 82 [2021-05-21 20:33:03,475 INFO L226 Difference]: Without dead ends: 75 [2021-05-21 20:33:03,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-21 20:33:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-05-21 20:33:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 109 transitions. [2021-05-21 20:33:03,477 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 109 transitions. Word has length 15 [2021-05-21 20:33:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:03,478 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 109 transitions. [2021-05-21 20:33:03,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 109 transitions. [2021-05-21 20:33:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:03,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:03,478 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:03,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-21 20:33:03,686 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:03,688 INFO L82 PathProgramCache]: Analyzing trace with hash 833619410, now seen corresponding path program 8 times [2021-05-21 20:33:03,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:03,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558465115] [2021-05-21 20:33:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:03,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:03,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558465115] [2021-05-21 20:33:03,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558465115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:03,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120840038] [2021-05-21 20:33:03,807 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 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 [2021-05-21 20:33:03,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:03,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:03,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:03,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120840038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:03,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:03,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:03,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609705791] [2021-05-21 20:33:03,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:03,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:03,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:03,946 INFO L87 Difference]: Start difference. First operand 56 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:04,071 INFO L93 Difference]: Finished difference Result 92 states and 172 transitions. [2021-05-21 20:33:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:04,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:04,079 INFO L225 Difference]: With dead ends: 92 [2021-05-21 20:33:04,079 INFO L226 Difference]: Without dead ends: 85 [2021-05-21 20:33:04,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-21 20:33:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-05-21 20:33:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-05-21 20:33:04,085 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-05-21 20:33:04,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:04,086 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-05-21 20:33:04,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-05-21 20:33:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:04,086 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:04,086 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:04,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 20:33:04,301 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash 849080206, now seen corresponding path program 9 times [2021-05-21 20:33:04,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:04,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775614021] [2021-05-21 20:33:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:04,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775614021] [2021-05-21 20:33:04,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775614021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024568727] [2021-05-21 20:33:04,362 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:04,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:04,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:04,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:04,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024568727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:04,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:04,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:04,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051773664] [2021-05-21 20:33:04,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:04,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:04,486 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:04,598 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-05-21 20:33:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:04,599 INFO L225 Difference]: With dead ends: 98 [2021-05-21 20:33:04,599 INFO L226 Difference]: Without dead ends: 91 [2021-05-21 20:33:04,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-21 20:33:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2021-05-21 20:33:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-05-21 20:33:04,601 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-05-21 20:33:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:04,602 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-05-21 20:33:04,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-05-21 20:33:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:04,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:04,602 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:04,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 20:33:04,817 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1420535012, now seen corresponding path program 10 times [2021-05-21 20:33:04,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:04,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804339912] [2021-05-21 20:33:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:04,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:04,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804339912] [2021-05-21 20:33:04,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804339912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:04,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804583133] [2021-05-21 20:33:04,869 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 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 [2021-05-21 20:33:04,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:04,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:04,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:05,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804583133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:05,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:05,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:05,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167232955] [2021-05-21 20:33:05,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:05,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:05,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:05,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:05,045 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:05,140 INFO L93 Difference]: Finished difference Result 75 states and 142 transitions. [2021-05-21 20:33:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:05,140 INFO L225 Difference]: With dead ends: 75 [2021-05-21 20:33:05,141 INFO L226 Difference]: Without dead ends: 68 [2021-05-21 20:33:05,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-21 20:33:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-05-21 20:33:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-05-21 20:33:05,143 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-05-21 20:33:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:05,143 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-05-21 20:33:05,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-05-21 20:33:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:05,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:05,143 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:05,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:05,359 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1788920398, now seen corresponding path program 11 times [2021-05-21 20:33:05,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:05,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230077336] [2021-05-21 20:33:05,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:05,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:05,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230077336] [2021-05-21 20:33:05,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230077336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:05,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157221461] [2021-05-21 20:33:05,416 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 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 [2021-05-21 20:33:05,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:05,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:05,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:05,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:05,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157221461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:05,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:05,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:05,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307530876] [2021-05-21 20:33:05,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:05,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:05,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:05,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:05,607 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:05,708 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2021-05-21 20:33:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:05,709 INFO L225 Difference]: With dead ends: 76 [2021-05-21 20:33:05,709 INFO L226 Difference]: Without dead ends: 69 [2021-05-21 20:33:05,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-21 20:33:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-21 20:33:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-05-21 20:33:05,711 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-05-21 20:33:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:05,711 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-05-21 20:33:05,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-05-21 20:33:05,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:05,711 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:05,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:05,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 20:33:05,927 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash -426753070, now seen corresponding path program 12 times [2021-05-21 20:33:05,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:05,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795794829] [2021-05-21 20:33:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:05,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:05,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795794829] [2021-05-21 20:33:05,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795794829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:05,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118845710] [2021-05-21 20:33:05,998 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 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 [2021-05-21 20:33:06,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:06,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:06,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118845710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:06,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:06,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:06,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24350071] [2021-05-21 20:33:06,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:06,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:06,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:06,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:06,130 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:06,283 INFO L93 Difference]: Finished difference Result 99 states and 184 transitions. [2021-05-21 20:33:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:06,283 INFO L225 Difference]: With dead ends: 99 [2021-05-21 20:33:06,283 INFO L226 Difference]: Without dead ends: 92 [2021-05-21 20:33:06,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-21 20:33:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-05-21 20:33:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-05-21 20:33:06,285 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-05-21 20:33:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:06,286 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-05-21 20:33:06,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-05-21 20:33:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:06,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:06,286 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:06,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 20:33:06,487 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:06,487 INFO L82 PathProgramCache]: Analyzing trace with hash -411292274, now seen corresponding path program 13 times [2021-05-21 20:33:06,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:06,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725425946] [2021-05-21 20:33:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:06,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:06,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725425946] [2021-05-21 20:33:06,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725425946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:06,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697535205] [2021-05-21 20:33:06,555 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 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 [2021-05-21 20:33:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:06,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:06,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:06,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697535205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:06,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:06,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:06,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048946412] [2021-05-21 20:33:06,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:06,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:06,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:06,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:06,697 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:06,811 INFO L93 Difference]: Finished difference Result 86 states and 166 transitions. [2021-05-21 20:33:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:06,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:06,812 INFO L225 Difference]: With dead ends: 86 [2021-05-21 20:33:06,812 INFO L226 Difference]: Without dead ends: 79 [2021-05-21 20:33:06,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-21 20:33:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-05-21 20:33:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 119 transitions. [2021-05-21 20:33:06,814 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 119 transitions. Word has length 15 [2021-05-21 20:33:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:06,814 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 119 transitions. [2021-05-21 20:33:06,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 119 transitions. [2021-05-21 20:33:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:06,815 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:06,815 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:07,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 20:33:07,029 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1719417690, now seen corresponding path program 14 times [2021-05-21 20:33:07,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:07,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330950264] [2021-05-21 20:33:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:07,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:07,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330950264] [2021-05-21 20:33:07,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330950264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:07,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892327316] [2021-05-21 20:33:07,086 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 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 [2021-05-21 20:33:07,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:07,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:07,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:07,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:07,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892327316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:07,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:07,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:07,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224682068] [2021-05-21 20:33:07,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:07,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:07,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:07,260 INFO L87 Difference]: Start difference. First operand 61 states and 119 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:07,376 INFO L93 Difference]: Finished difference Result 96 states and 180 transitions. [2021-05-21 20:33:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:07,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:07,377 INFO L225 Difference]: With dead ends: 96 [2021-05-21 20:33:07,377 INFO L226 Difference]: Without dead ends: 89 [2021-05-21 20:33:07,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:07,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-21 20:33:07,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-05-21 20:33:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-05-21 20:33:07,379 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-05-21 20:33:07,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:07,379 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-05-21 20:33:07,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-05-21 20:33:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:07,379 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:07,379 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:07,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:07,595 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1734878486, now seen corresponding path program 15 times [2021-05-21 20:33:07,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:07,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963289728] [2021-05-21 20:33:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:07,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:07,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963289728] [2021-05-21 20:33:07,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963289728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:07,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893427803] [2021-05-21 20:33:07,650 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 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 [2021-05-21 20:33:07,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:33:07,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:07,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:07,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893427803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:07,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:07,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:07,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542084542] [2021-05-21 20:33:07,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:07,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:07,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:07,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:07,816 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:07,949 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-05-21 20:33:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:07,950 INFO L225 Difference]: With dead ends: 102 [2021-05-21 20:33:07,950 INFO L226 Difference]: Without dead ends: 95 [2021-05-21 20:33:07,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-21 20:33:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-05-21 20:33:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-05-21 20:33:07,956 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-05-21 20:33:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:07,956 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-05-21 20:33:07,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-05-21 20:33:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:07,957 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:07,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:08,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:08,161 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1988634004, now seen corresponding path program 16 times [2021-05-21 20:33:08,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:08,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039908986] [2021-05-21 20:33:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:08,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039908986] [2021-05-21 20:33:08,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039908986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274822689] [2021-05-21 20:33:08,221 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 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 [2021-05-21 20:33:08,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:08,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:08,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274822689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:08,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:08,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-21 20:33:08,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912476494] [2021-05-21 20:33:08,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:08,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:08,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:08,339 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:08,433 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-05-21 20:33:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:08,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:08,434 INFO L225 Difference]: With dead ends: 79 [2021-05-21 20:33:08,434 INFO L226 Difference]: Without dead ends: 72 [2021-05-21 20:33:08,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-21 20:33:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-05-21 20:33:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-05-21 20:33:08,436 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-05-21 20:33:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:08,436 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-05-21 20:33:08,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:08,436 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-05-21 20:33:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:08,436 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:08,437 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:08,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 20:33:08,652 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:08,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:08,652 INFO L82 PathProgramCache]: Analyzing trace with hash 625326102, now seen corresponding path program 17 times [2021-05-21 20:33:08,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:08,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338813238] [2021-05-21 20:33:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:08,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:08,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338813238] [2021-05-21 20:33:08,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338813238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:08,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862600125] [2021-05-21 20:33:08,710 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 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 [2021-05-21 20:33:08,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:08,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:08,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:08,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:08,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862600125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:08,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:08,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 20:33:08,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316868278] [2021-05-21 20:33:08,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:33:08,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:33:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:08,855 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:09,020 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-05-21 20:33:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:09,021 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:09,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:09,021 INFO L225 Difference]: With dead ends: 99 [2021-05-21 20:33:09,021 INFO L226 Difference]: Without dead ends: 92 [2021-05-21 20:33:09,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-21 20:33:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-05-21 20:33:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 61 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 124 transitions. [2021-05-21 20:33:09,024 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 124 transitions. Word has length 15 [2021-05-21 20:33:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:09,024 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 124 transitions. [2021-05-21 20:33:09,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 124 transitions. [2021-05-21 20:33:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:09,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:09,025 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:09,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 20:33:09,237 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:09,237 INFO L82 PathProgramCache]: Analyzing trace with hash 640786898, now seen corresponding path program 18 times [2021-05-21 20:33:09,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:09,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434603091] [2021-05-21 20:33:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:09,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:09,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434603091] [2021-05-21 20:33:09,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434603091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:09,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478685117] [2021-05-21 20:33:09,300 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:33:09,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:33:09,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:09,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:09,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:09,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478685117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:09,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:09,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 20:33:09,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005730798] [2021-05-21 20:33:09,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:33:09,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:33:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:09,440 INFO L87 Difference]: Start difference. First operand 62 states and 124 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:09,573 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-05-21 20:33:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:09,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:09,574 INFO L225 Difference]: With dead ends: 105 [2021-05-21 20:33:09,574 INFO L226 Difference]: Without dead ends: 98 [2021-05-21 20:33:09,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:09,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-21 20:33:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-05-21 20:33:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2021-05-21 20:33:09,575 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 15 [2021-05-21 20:33:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:09,576 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2021-05-21 20:33:09,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2021-05-21 20:33:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:09,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:09,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:09,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:09,792 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:09,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1212241704, now seen corresponding path program 19 times [2021-05-21 20:33:09,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:09,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221064138] [2021-05-21 20:33:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:09,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:09,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221064138] [2021-05-21 20:33:09,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221064138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:09,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823711059] [2021-05-21 20:33:09,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:33:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:10,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823711059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:10,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:10,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 20:33:10,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675342156] [2021-05-21 20:33:10,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:33:10,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:10,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:33:10,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:10,017 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:10,129 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-05-21 20:33:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:10,130 INFO L225 Difference]: With dead ends: 85 [2021-05-21 20:33:10,130 INFO L226 Difference]: Without dead ends: 78 [2021-05-21 20:33:10,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:10,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-21 20:33:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-05-21 20:33:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-05-21 20:33:10,132 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-05-21 20:33:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:10,132 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-05-21 20:33:10,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-05-21 20:33:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:10,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:10,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:10,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 20:33:10,337 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash 51263382, now seen corresponding path program 3 times [2021-05-21 20:33:10,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:10,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720601737] [2021-05-21 20:33:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:10,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:10,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720601737] [2021-05-21 20:33:10,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720601737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:10,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739145223] [2021-05-21 20:33:10,417 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:33:10,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:10,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:10,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:33:10,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:10,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739145223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:10,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:10,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:33:10,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892550024] [2021-05-21 20:33:10,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:33:10,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:10,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:33:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:10,502 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:10,611 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2021-05-21 20:33:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:33:10,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:33:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:10,612 INFO L225 Difference]: With dead ends: 92 [2021-05-21 20:33:10,612 INFO L226 Difference]: Without dead ends: 81 [2021-05-21 20:33:10,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-21 20:33:10,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-05-21 20:33:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 127 transitions. [2021-05-21 20:33:10,615 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 127 transitions. Word has length 15 [2021-05-21 20:33:10,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:10,615 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 127 transitions. [2021-05-21 20:33:10,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 127 transitions. [2021-05-21 20:33:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:10,615 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:10,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:10,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:10,821 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:10,821 INFO L82 PathProgramCache]: Analyzing trace with hash 674386126, now seen corresponding path program 20 times [2021-05-21 20:33:10,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:10,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225189488] [2021-05-21 20:33:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:10,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:10,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225189488] [2021-05-21 20:33:10,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225189488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:10,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773782677] [2021-05-21 20:33:10,881 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 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 [2021-05-21 20:33:10,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:10,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:10,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:33:10,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:11,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773782677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:11,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:11,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-21 20:33:11,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140136518] [2021-05-21 20:33:11,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:33:11,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:11,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:33:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:11,023 INFO L87 Difference]: Start difference. First operand 64 states and 127 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:11,125 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-05-21 20:33:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:33:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:11,126 INFO L225 Difference]: With dead ends: 86 [2021-05-21 20:33:11,126 INFO L226 Difference]: Without dead ends: 79 [2021-05-21 20:33:11,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-21 20:33:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-05-21 20:33:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2021-05-21 20:33:11,127 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 15 [2021-05-21 20:33:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:11,127 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2021-05-21 20:33:11,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:11,128 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2021-05-21 20:33:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:11,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:11,128 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:11,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 20:33:11,345 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash 59077016, now seen corresponding path program 3 times [2021-05-21 20:33:11,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:11,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83849572] [2021-05-21 20:33:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:11,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:11,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83849572] [2021-05-21 20:33:11,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83849572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:11,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131256630] [2021-05-21 20:33:11,441 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 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 [2021-05-21 20:33:11,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:33:11,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:33:11,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:11,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131256630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:11,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:11,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-21 20:33:11,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465656352] [2021-05-21 20:33:11,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:11,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:11,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:11,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:11,540 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:11,713 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-05-21 20:33:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:33:11,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:11,714 INFO L225 Difference]: With dead ends: 97 [2021-05-21 20:33:11,714 INFO L226 Difference]: Without dead ends: 84 [2021-05-21 20:33:11,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-21 20:33:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-05-21 20:33:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-05-21 20:33:11,716 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-05-21 20:33:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:11,717 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-05-21 20:33:11,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-05-21 20:33:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:11,717 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:11,717 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:11,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 20:33:11,918 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2083408152, now seen corresponding path program 21 times [2021-05-21 20:33:11,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:11,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242522762] [2021-05-21 20:33:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:12,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:12,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242522762] [2021-05-21 20:33:12,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242522762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:12,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720825245] [2021-05-21 20:33:12,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:12,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:12,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:12,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720825245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:12,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:12,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:12,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11199522] [2021-05-21 20:33:12,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:12,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:12,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:12,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:12,185 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:12,471 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-05-21 20:33:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:12,471 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:12,471 INFO L225 Difference]: With dead ends: 99 [2021-05-21 20:33:12,471 INFO L226 Difference]: Without dead ends: 92 [2021-05-21 20:33:12,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:33:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-21 20:33:12,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-05-21 20:33:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-05-21 20:33:12,473 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-05-21 20:33:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:12,473 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-05-21 20:33:12,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-05-21 20:33:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:12,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:12,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:12,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 20:33:12,689 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:12,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1700687764, now seen corresponding path program 22 times [2021-05-21 20:33:12,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:12,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290911943] [2021-05-21 20:33:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:12,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:12,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290911943] [2021-05-21 20:33:12,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290911943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:12,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004069985] [2021-05-21 20:33:12,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:12,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:12,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:12,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:12,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004069985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:12,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:12,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:12,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303656779] [2021-05-21 20:33:12,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:12,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:12,981 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:13,214 INFO L93 Difference]: Finished difference Result 104 states and 198 transitions. [2021-05-21 20:33:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:13,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:13,214 INFO L225 Difference]: With dead ends: 104 [2021-05-21 20:33:13,214 INFO L226 Difference]: Without dead ends: 97 [2021-05-21 20:33:13,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-21 20:33:13,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2021-05-21 20:33:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-05-21 20:33:13,216 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-05-21 20:33:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:13,216 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-05-21 20:33:13,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-05-21 20:33:13,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:13,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:13,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:13,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 20:33:13,433 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:13,433 INFO L82 PathProgramCache]: Analyzing trace with hash -514985704, now seen corresponding path program 23 times [2021-05-21 20:33:13,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:13,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686879745] [2021-05-21 20:33:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:13,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:13,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686879745] [2021-05-21 20:33:13,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686879745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:13,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238727203] [2021-05-21 20:33:13,522 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 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 [2021-05-21 20:33:13,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:13,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:13,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:13,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238727203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:13,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:13,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:13,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65544456] [2021-05-21 20:33:13,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:13,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:13,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:13,694 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:13,982 INFO L93 Difference]: Finished difference Result 130 states and 246 transitions. [2021-05-21 20:33:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:13,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:13,983 INFO L225 Difference]: With dead ends: 130 [2021-05-21 20:33:13,983 INFO L226 Difference]: Without dead ends: 123 [2021-05-21 20:33:13,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-21 20:33:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-05-21 20:33:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-05-21 20:33:13,985 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-05-21 20:33:13,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:13,985 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-05-21 20:33:13,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:13,986 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-05-21 20:33:13,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:13,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:13,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:14,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:14,197 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:14,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:14,197 INFO L82 PathProgramCache]: Analyzing trace with hash -499524908, now seen corresponding path program 24 times [2021-05-21 20:33:14,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:14,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723738811] [2021-05-21 20:33:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:14,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:14,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723738811] [2021-05-21 20:33:14,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723738811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:14,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470573510] [2021-05-21 20:33:14,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:14,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:14,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:14,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:14,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470573510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:14,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:14,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:14,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096575068] [2021-05-21 20:33:14,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:14,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:14,468 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:14,738 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-05-21 20:33:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:14,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:14,739 INFO L225 Difference]: With dead ends: 113 [2021-05-21 20:33:14,739 INFO L226 Difference]: Without dead ends: 106 [2021-05-21 20:33:14,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:14,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-21 20:33:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-05-21 20:33:14,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-05-21 20:33:14,741 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-05-21 20:33:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:14,742 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-05-21 20:33:14,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-05-21 20:33:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:14,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:14,742 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:14,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:14,945 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1651089708, now seen corresponding path program 25 times [2021-05-21 20:33:14,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:14,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019792553] [2021-05-21 20:33:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:15,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:15,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019792553] [2021-05-21 20:33:15,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019792553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:15,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635510331] [2021-05-21 20:33:15,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:15,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:15,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:15,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635510331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:15,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:15,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:15,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546014768] [2021-05-21 20:33:15,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:15,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:15,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:15,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:15,191 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:15,450 INFO L93 Difference]: Finished difference Result 124 states and 236 transitions. [2021-05-21 20:33:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:33:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:15,451 INFO L225 Difference]: With dead ends: 124 [2021-05-21 20:33:15,451 INFO L226 Difference]: Without dead ends: 117 [2021-05-21 20:33:15,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-21 20:33:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2021-05-21 20:33:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-05-21 20:33:15,454 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-05-21 20:33:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:15,454 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-05-21 20:33:15,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-05-21 20:33:15,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:15,454 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:15,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:15,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:15,670 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:15,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1635628912, now seen corresponding path program 26 times [2021-05-21 20:33:15,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:15,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211464538] [2021-05-21 20:33:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:15,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:15,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211464538] [2021-05-21 20:33:15,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211464538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:15,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426880274] [2021-05-21 20:33:15,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:15,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:15,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:15,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:15,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426880274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:15,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:15,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066508665] [2021-05-21 20:33:15,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:15,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:15,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:15,933 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:16,198 INFO L93 Difference]: Finished difference Result 127 states and 241 transitions. [2021-05-21 20:33:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:16,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:16,199 INFO L225 Difference]: With dead ends: 127 [2021-05-21 20:33:16,199 INFO L226 Difference]: Without dead ends: 120 [2021-05-21 20:33:16,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-21 20:33:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-05-21 20:33:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-05-21 20:33:16,201 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-05-21 20:33:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:16,201 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-05-21 20:33:16,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-05-21 20:33:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:16,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:16,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:16,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 20:33:16,409 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1064174106, now seen corresponding path program 27 times [2021-05-21 20:33:16,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:16,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010646425] [2021-05-21 20:33:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:16,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:16,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010646425] [2021-05-21 20:33:16,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010646425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:16,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376898115] [2021-05-21 20:33:16,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:16,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:33:16,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:16,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:16,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:16,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376898115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:16,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:16,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660867083] [2021-05-21 20:33:16,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:16,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:16,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:16,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:16,654 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:16,766 INFO L93 Difference]: Finished difference Result 96 states and 184 transitions. [2021-05-21 20:33:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:33:16,767 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:16,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:16,767 INFO L225 Difference]: With dead ends: 96 [2021-05-21 20:33:16,767 INFO L226 Difference]: Without dead ends: 89 [2021-05-21 20:33:16,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-21 20:33:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-05-21 20:33:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-05-21 20:33:16,769 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-05-21 20:33:16,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:16,769 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-05-21 20:33:16,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:16,769 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-05-21 20:33:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:16,769 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:16,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:16,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:16,985 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1845444760, now seen corresponding path program 28 times [2021-05-21 20:33:16,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:16,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901881617] [2021-05-21 20:33:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:17,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:17,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901881617] [2021-05-21 20:33:17,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901881617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:17,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613746278] [2021-05-21 20:33:17,051 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 [2021-05-21 20:33:17,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:17,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:17,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613746278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:17,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:17,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-21 20:33:17,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207726168] [2021-05-21 20:33:17,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:33:17,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:17,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:33:17,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:17,252 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:17,689 INFO L93 Difference]: Finished difference Result 112 states and 205 transitions. [2021-05-21 20:33:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-05-21 20:33:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:17,690 INFO L225 Difference]: With dead ends: 112 [2021-05-21 20:33:17,690 INFO L226 Difference]: Without dead ends: 76 [2021-05-21 20:33:17,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:33:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-21 20:33:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-05-21 20:33:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-05-21 20:33:17,692 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-05-21 20:33:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:17,692 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-05-21 20:33:17,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-05-21 20:33:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:17,692 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:17,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:17,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 20:33:17,901 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash -695788720, now seen corresponding path program 29 times [2021-05-21 20:33:17,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:17,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442686303] [2021-05-21 20:33:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:17,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:17,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442686303] [2021-05-21 20:33:17,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442686303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:17,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285786272] [2021-05-21 20:33:17,980 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 [2021-05-21 20:33:18,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:18,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:18,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285786272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:18,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:18,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:18,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137534320] [2021-05-21 20:33:18,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:18,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:18,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:18,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:18,151 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:18,345 INFO L93 Difference]: Finished difference Result 95 states and 181 transitions. [2021-05-21 20:33:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:18,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:18,346 INFO L225 Difference]: With dead ends: 95 [2021-05-21 20:33:18,346 INFO L226 Difference]: Without dead ends: 88 [2021-05-21 20:33:18,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-21 20:33:18,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-05-21 20:33:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-05-21 20:33:18,348 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-05-21 20:33:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:18,348 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-05-21 20:33:18,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-05-21 20:33:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:18,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:18,348 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:18,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:18,564 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:18,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1383505108, now seen corresponding path program 30 times [2021-05-21 20:33:18,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:18,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541149003] [2021-05-21 20:33:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:18,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:18,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541149003] [2021-05-21 20:33:18,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541149003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:18,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068991325] [2021-05-21 20:33:18,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:18,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:18,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:18,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068991325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:18,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:18,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:18,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183335820] [2021-05-21 20:33:18,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:18,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:18,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:18,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:18,860 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:19,090 INFO L93 Difference]: Finished difference Result 136 states and 258 transitions. [2021-05-21 20:33:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:19,090 INFO L225 Difference]: With dead ends: 136 [2021-05-21 20:33:19,090 INFO L226 Difference]: Without dead ends: 129 [2021-05-21 20:33:19,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-21 20:33:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2021-05-21 20:33:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-05-21 20:33:19,092 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-05-21 20:33:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:19,092 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-05-21 20:33:19,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-05-21 20:33:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:19,093 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:19,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:19,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 20:33:19,309 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:19,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1398965904, now seen corresponding path program 31 times [2021-05-21 20:33:19,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:19,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085772065] [2021-05-21 20:33:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:19,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:19,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085772065] [2021-05-21 20:33:19,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085772065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:19,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725574121] [2021-05-21 20:33:19,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:19,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:19,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:19,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725574121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:19,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:19,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:19,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948949173] [2021-05-21 20:33:19,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:19,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:19,554 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:19,819 INFO L93 Difference]: Finished difference Result 122 states and 238 transitions. [2021-05-21 20:33:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:19,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:19,821 INFO L225 Difference]: With dead ends: 122 [2021-05-21 20:33:19,821 INFO L226 Difference]: Without dead ends: 115 [2021-05-21 20:33:19,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:19,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-21 20:33:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2021-05-21 20:33:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 145 transitions. [2021-05-21 20:33:19,822 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 145 transitions. Word has length 17 [2021-05-21 20:33:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:19,823 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 145 transitions. [2021-05-21 20:33:19,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 145 transitions. [2021-05-21 20:33:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:19,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:19,823 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:20,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 20:33:20,033 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash -765291428, now seen corresponding path program 32 times [2021-05-21 20:33:20,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:20,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152439994] [2021-05-21 20:33:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:20,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:20,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152439994] [2021-05-21 20:33:20,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152439994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:20,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960029782] [2021-05-21 20:33:20,115 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 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 [2021-05-21 20:33:20,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:20,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:20,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960029782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:20,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:20,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:20,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870468931] [2021-05-21 20:33:20,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:20,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:20,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:20,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:20,282 INFO L87 Difference]: Start difference. First operand 74 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:20,571 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-05-21 20:33:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:20,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:20,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:20,572 INFO L225 Difference]: With dead ends: 134 [2021-05-21 20:33:20,572 INFO L226 Difference]: Without dead ends: 127 [2021-05-21 20:33:20,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-21 20:33:20,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 76. [2021-05-21 20:33:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-05-21 20:33:20,574 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-05-21 20:33:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:20,574 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-05-21 20:33:20,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-05-21 20:33:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:20,574 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:20,574 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:20,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 20:33:20,789 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:20,789 INFO L82 PathProgramCache]: Analyzing trace with hash -749830632, now seen corresponding path program 33 times [2021-05-21 20:33:20,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:20,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84144915] [2021-05-21 20:33:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:20,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:20,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84144915] [2021-05-21 20:33:20,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84144915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:20,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664725722] [2021-05-21 20:33:20,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:33:20,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:20,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:20,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:21,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664725722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:21,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:21,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:21,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126190112] [2021-05-21 20:33:21,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:21,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:21,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:21,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:21,054 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:21,387 INFO L93 Difference]: Finished difference Result 145 states and 275 transitions. [2021-05-21 20:33:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:21,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:21,388 INFO L225 Difference]: With dead ends: 145 [2021-05-21 20:33:21,388 INFO L226 Difference]: Without dead ends: 138 [2021-05-21 20:33:21,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-21 20:33:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 75. [2021-05-21 20:33:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-05-21 20:33:21,390 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-05-21 20:33:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:21,390 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-05-21 20:33:21,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-05-21 20:33:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:21,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:21,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:21,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 20:33:21,601 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:21,601 INFO L82 PathProgramCache]: Analyzing trace with hash -178375826, now seen corresponding path program 34 times [2021-05-21 20:33:21,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:21,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976920879] [2021-05-21 20:33:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:21,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:21,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976920879] [2021-05-21 20:33:21,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976920879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:21,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464049] [2021-05-21 20:33:21,692 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 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 [2021-05-21 20:33:21,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:21,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:21,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:21,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:21,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:21,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:21,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:21,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045563614] [2021-05-21 20:33:21,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:21,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:21,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:21,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:21,912 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:22,153 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-05-21 20:33:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:22,154 INFO L225 Difference]: With dead ends: 105 [2021-05-21 20:33:22,154 INFO L226 Difference]: Without dead ends: 98 [2021-05-21 20:33:22,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:22,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-21 20:33:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2021-05-21 20:33:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-05-21 20:33:22,155 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-05-21 20:33:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:22,155 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-05-21 20:33:22,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:22,155 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-05-21 20:33:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:22,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:22,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:22,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:22,361 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1859383016, now seen corresponding path program 35 times [2021-05-21 20:33:22,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:22,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914040100] [2021-05-21 20:33:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:22,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:22,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914040100] [2021-05-21 20:33:22,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914040100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:22,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049630327] [2021-05-21 20:33:22,438 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 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 [2021-05-21 20:33:22,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:22,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:22,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:22,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:22,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049630327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:22,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:22,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:22,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833577491] [2021-05-21 20:33:22,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:22,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:22,606 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:22,942 INFO L93 Difference]: Finished difference Result 154 states and 296 transitions. [2021-05-21 20:33:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:22,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:22,943 INFO L225 Difference]: With dead ends: 154 [2021-05-21 20:33:22,943 INFO L226 Difference]: Without dead ends: 147 [2021-05-21 20:33:22,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:33:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-21 20:33:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 76. [2021-05-21 20:33:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 75 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2021-05-21 20:33:22,945 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 17 [2021-05-21 20:33:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:22,945 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2021-05-21 20:33:22,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2021-05-21 20:33:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:22,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:22,945 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:23,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-21 20:33:23,161 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:23,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1843922220, now seen corresponding path program 36 times [2021-05-21 20:33:23,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:23,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966328813] [2021-05-21 20:33:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:23,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:23,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966328813] [2021-05-21 20:33:23,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966328813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:23,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640892529] [2021-05-21 20:33:23,245 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 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 [2021-05-21 20:33:23,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:23,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640892529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:23,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:23,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589727227] [2021-05-21 20:33:23,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:23,416 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:23,802 INFO L93 Difference]: Finished difference Result 168 states and 320 transitions. [2021-05-21 20:33:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:33:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:23,803 INFO L225 Difference]: With dead ends: 168 [2021-05-21 20:33:23,803 INFO L226 Difference]: Without dead ends: 161 [2021-05-21 20:33:23,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-21 20:33:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2021-05-21 20:33:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-05-21 20:33:23,805 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-05-21 20:33:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:23,805 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-05-21 20:33:23,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-05-21 20:33:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:23,806 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:23,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:24,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:24,021 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:24,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1272467414, now seen corresponding path program 37 times [2021-05-21 20:33:24,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:24,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793751737] [2021-05-21 20:33:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:24,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:24,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793751737] [2021-05-21 20:33:24,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793751737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:24,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814902017] [2021-05-21 20:33:24,087 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 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 [2021-05-21 20:33:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:24,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:24,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:24,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814902017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:24,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:24,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:24,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171402498] [2021-05-21 20:33:24,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:24,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:24,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:24,246 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:24,540 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-05-21 20:33:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:24,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:24,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:24,541 INFO L225 Difference]: With dead ends: 126 [2021-05-21 20:33:24,541 INFO L226 Difference]: Without dead ends: 119 [2021-05-21 20:33:24,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-21 20:33:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2021-05-21 20:33:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 147 transitions. [2021-05-21 20:33:24,543 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 147 transitions. Word has length 17 [2021-05-21 20:33:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:24,543 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 147 transitions. [2021-05-21 20:33:24,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:24,543 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 147 transitions. [2021-05-21 20:33:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:24,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:24,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:24,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:24,759 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:24,759 INFO L82 PathProgramCache]: Analyzing trace with hash 164948120, now seen corresponding path program 38 times [2021-05-21 20:33:24,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:24,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249479904] [2021-05-21 20:33:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:24,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:24,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249479904] [2021-05-21 20:33:24,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249479904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:24,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741720823] [2021-05-21 20:33:24,822 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 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 [2021-05-21 20:33:24,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:24,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:24,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:25,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741720823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:25,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:25,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-21 20:33:25,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942032715] [2021-05-21 20:33:25,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:33:25,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:25,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:33:25,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:25,012 INFO L87 Difference]: Start difference. First operand 74 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:25,454 INFO L93 Difference]: Finished difference Result 140 states and 249 transitions. [2021-05-21 20:33:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:25,455 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-05-21 20:33:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:25,455 INFO L225 Difference]: With dead ends: 140 [2021-05-21 20:33:25,455 INFO L226 Difference]: Without dead ends: 107 [2021-05-21 20:33:25,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:33:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-21 20:33:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-05-21 20:33:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 157 transitions. [2021-05-21 20:33:25,457 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 157 transitions. Word has length 17 [2021-05-21 20:33:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:25,457 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 157 transitions. [2021-05-21 20:33:25,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 157 transitions. [2021-05-21 20:33:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:25,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:25,457 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:25,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 20:33:25,658 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:25,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:25,658 INFO L82 PathProgramCache]: Analyzing trace with hash -217772268, now seen corresponding path program 39 times [2021-05-21 20:33:25,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:25,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812168846] [2021-05-21 20:33:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:25,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812168846] [2021-05-21 20:33:25,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812168846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689978348] [2021-05-21 20:33:25,724 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 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 [2021-05-21 20:33:25,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:25,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:25,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689978348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:25,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:25,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-21 20:33:25,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910574072] [2021-05-21 20:33:25,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:33:25,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:25,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:33:25,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:25,949 INFO L87 Difference]: Start difference. First operand 79 states and 157 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:26,263 INFO L93 Difference]: Finished difference Result 111 states and 210 transitions. [2021-05-21 20:33:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-05-21 20:33:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:26,264 INFO L225 Difference]: With dead ends: 111 [2021-05-21 20:33:26,264 INFO L226 Difference]: Without dead ends: 104 [2021-05-21 20:33:26,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-21 20:33:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2021-05-21 20:33:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-05-21 20:33:26,266 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-05-21 20:33:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:26,266 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-05-21 20:33:26,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-05-21 20:33:26,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:26,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:26,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:26,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 20:33:26,467 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:26,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:26,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1861521560, now seen corresponding path program 40 times [2021-05-21 20:33:26,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:26,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768586993] [2021-05-21 20:33:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:26,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:26,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768586993] [2021-05-21 20:33:26,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768586993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:26,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276790254] [2021-05-21 20:33:26,537 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 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 [2021-05-21 20:33:26,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:26,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:26,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:26,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276790254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:26,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:26,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-21 20:33:26,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599523786] [2021-05-21 20:33:26,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:33:26,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:33:26,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:26,738 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:27,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:27,262 INFO L93 Difference]: Finished difference Result 182 states and 330 transitions. [2021-05-21 20:33:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:33:27,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-05-21 20:33:27,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:27,263 INFO L225 Difference]: With dead ends: 182 [2021-05-21 20:33:27,263 INFO L226 Difference]: Without dead ends: 175 [2021-05-21 20:33:27,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:33:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-21 20:33:27,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 78. [2021-05-21 20:33:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-05-21 20:33:27,269 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-05-21 20:33:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:27,269 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-05-21 20:33:27,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-05-21 20:33:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:27,270 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:27,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:27,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 20:33:27,470 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:27,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1876982356, now seen corresponding path program 41 times [2021-05-21 20:33:27,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:27,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771928607] [2021-05-21 20:33:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:27,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:27,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771928607] [2021-05-21 20:33:27,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771928607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:27,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090855451] [2021-05-21 20:33:27,602 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:27,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:33:27,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:27,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:27,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:27,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090855451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:27,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:27,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-21 20:33:27,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543706519] [2021-05-21 20:33:27,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:33:27,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:33:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:27,795 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:28,396 INFO L93 Difference]: Finished difference Result 174 states and 320 transitions. [2021-05-21 20:33:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:33:28,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-05-21 20:33:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:28,397 INFO L225 Difference]: With dead ends: 174 [2021-05-21 20:33:28,397 INFO L226 Difference]: Without dead ends: 167 [2021-05-21 20:33:28,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 590.4ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:33:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-21 20:33:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 77. [2021-05-21 20:33:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-05-21 20:33:28,399 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-05-21 20:33:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:28,399 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-05-21 20:33:28,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-05-21 20:33:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-05-21 20:33:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:28,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:28,400 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:28,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:28,616 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:28,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1810322992, now seen corresponding path program 42 times [2021-05-21 20:33:28,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:28,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005691501] [2021-05-21 20:33:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:28,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005691501] [2021-05-21 20:33:28,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005691501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448209192] [2021-05-21 20:33:28,691 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:33:28,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:33:28,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:28,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:28,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:28,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448209192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:28,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:28,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:28,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74401500] [2021-05-21 20:33:28,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:28,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:28,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:28,849 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:29,089 INFO L93 Difference]: Finished difference Result 127 states and 236 transitions. [2021-05-21 20:33:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:29,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:29,090 INFO L225 Difference]: With dead ends: 127 [2021-05-21 20:33:29,090 INFO L226 Difference]: Without dead ends: 113 [2021-05-21 20:33:29,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-21 20:33:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-05-21 20:33:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 165 transitions. [2021-05-21 20:33:29,092 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 165 transitions. Word has length 17 [2021-05-21 20:33:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:29,092 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 165 transitions. [2021-05-21 20:33:29,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 165 transitions. [2021-05-21 20:33:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:29,092 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:29,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:29,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 20:33:29,321 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1561329620, now seen corresponding path program 43 times [2021-05-21 20:33:29,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:29,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493262441] [2021-05-21 20:33:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:29,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:29,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493262441] [2021-05-21 20:33:29,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493262441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:29,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049504785] [2021-05-21 20:33:29,392 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 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 [2021-05-21 20:33:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:29,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:29,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:29,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049504785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:29,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:29,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:29,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722191646] [2021-05-21 20:33:29,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:29,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:29,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:29,523 INFO L87 Difference]: Start difference. First operand 84 states and 165 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:29,919 INFO L93 Difference]: Finished difference Result 163 states and 312 transitions. [2021-05-21 20:33:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:29,919 INFO L225 Difference]: With dead ends: 163 [2021-05-21 20:33:29,919 INFO L226 Difference]: Without dead ends: 156 [2021-05-21 20:33:29,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:33:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-21 20:33:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-05-21 20:33:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 176 transitions. [2021-05-21 20:33:29,921 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 176 transitions. Word has length 17 [2021-05-21 20:33:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:29,921 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 176 transitions. [2021-05-21 20:33:29,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 176 transitions. [2021-05-21 20:33:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:29,922 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:29,922 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:30,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 20:33:30,125 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:30,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1576790416, now seen corresponding path program 44 times [2021-05-21 20:33:30,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:30,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993667996] [2021-05-21 20:33:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:30,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:30,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993667996] [2021-05-21 20:33:30,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993667996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:30,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549803549] [2021-05-21 20:33:30,203 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:30,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:30,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:30,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:30,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549803549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:30,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:30,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:30,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493080093] [2021-05-21 20:33:30,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:30,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:30,368 INFO L87 Difference]: Start difference. First operand 87 states and 176 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:30,789 INFO L93 Difference]: Finished difference Result 175 states and 333 transitions. [2021-05-21 20:33:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:30,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:30,790 INFO L225 Difference]: With dead ends: 175 [2021-05-21 20:33:30,790 INFO L226 Difference]: Without dead ends: 168 [2021-05-21 20:33:30,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-21 20:33:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 86. [2021-05-21 20:33:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-05-21 20:33:30,791 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-05-21 20:33:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:30,791 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-05-21 20:33:30,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-05-21 20:33:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:30,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:30,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:30,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:30,997 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2146722074, now seen corresponding path program 45 times [2021-05-21 20:33:30,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:30,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235126241] [2021-05-21 20:33:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:31,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:31,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235126241] [2021-05-21 20:33:31,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235126241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123563949] [2021-05-21 20:33:31,064 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 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 [2021-05-21 20:33:31,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:31,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:31,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:31,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:31,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123563949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:31,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:31,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865071725] [2021-05-21 20:33:31,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:31,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:31,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:31,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:31,224 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:31,535 INFO L93 Difference]: Finished difference Result 138 states and 262 transitions. [2021-05-21 20:33:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:31,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:31,536 INFO L225 Difference]: With dead ends: 138 [2021-05-21 20:33:31,536 INFO L226 Difference]: Without dead ends: 131 [2021-05-21 20:33:31,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-21 20:33:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-05-21 20:33:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-05-21 20:33:31,537 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-05-21 20:33:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:31,538 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-05-21 20:33:31,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-05-21 20:33:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:31,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:31,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:31,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-21 20:33:31,753 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash -709306540, now seen corresponding path program 46 times [2021-05-21 20:33:31,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:31,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924855887] [2021-05-21 20:33:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:31,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:31,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924855887] [2021-05-21 20:33:31,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924855887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547370924] [2021-05-21 20:33:31,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:33:31,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:31,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:31,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:31,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:31,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547370924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:31,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:31,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128788763] [2021-05-21 20:33:31,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:31,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:31,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:31,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:31,955 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:32,196 INFO L93 Difference]: Finished difference Result 145 states and 268 transitions. [2021-05-21 20:33:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:32,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:32,197 INFO L225 Difference]: With dead ends: 145 [2021-05-21 20:33:32,197 INFO L226 Difference]: Without dead ends: 131 [2021-05-21 20:33:32,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-21 20:33:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-05-21 20:33:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-05-21 20:33:32,198 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-05-21 20:33:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:32,199 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-05-21 20:33:32,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-05-21 20:33:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:32,199 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:32,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:32,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:32,413 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:32,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1092026928, now seen corresponding path program 47 times [2021-05-21 20:33:32,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:32,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244979795] [2021-05-21 20:33:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:32,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244979795] [2021-05-21 20:33:32,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244979795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935179457] [2021-05-21 20:33:32,471 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 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 [2021-05-21 20:33:32,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:32,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:32,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:32,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:32,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935179457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:32,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:32,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:32,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044511491] [2021-05-21 20:33:32,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:32,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:32,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:32,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:32,634 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:32,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:32,921 INFO L93 Difference]: Finished difference Result 134 states and 261 transitions. [2021-05-21 20:33:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:32,922 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:32,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:32,922 INFO L225 Difference]: With dead ends: 134 [2021-05-21 20:33:32,922 INFO L226 Difference]: Without dead ends: 127 [2021-05-21 20:33:32,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:33:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-21 20:33:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-05-21 20:33:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:32,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-05-21 20:33:32,924 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 17 [2021-05-21 20:33:32,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:32,924 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-05-21 20:33:32,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-05-21 20:33:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:32,924 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:32,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:33,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-21 20:33:33,125 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash 987266900, now seen corresponding path program 48 times [2021-05-21 20:33:33,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:33,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287039020] [2021-05-21 20:33:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:33,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:33,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287039020] [2021-05-21 20:33:33,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287039020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:33,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694143599] [2021-05-21 20:33:33,201 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 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 [2021-05-21 20:33:33,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:33,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:33,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694143599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:33,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:33,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:33,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045802232] [2021-05-21 20:33:33,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:33,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:33,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:33,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:33,357 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:33,715 INFO L93 Difference]: Finished difference Result 175 states and 338 transitions. [2021-05-21 20:33:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:33:33,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:33,716 INFO L225 Difference]: With dead ends: 175 [2021-05-21 20:33:33,716 INFO L226 Difference]: Without dead ends: 168 [2021-05-21 20:33:33,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-21 20:33:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 98. [2021-05-21 20:33:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-05-21 20:33:33,718 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 17 [2021-05-21 20:33:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:33,718 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-05-21 20:33:33,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-05-21 20:33:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:33,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:33,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:33,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-21 20:33:33,929 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:33,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:33,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1002727696, now seen corresponding path program 49 times [2021-05-21 20:33:33,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:33,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66902867] [2021-05-21 20:33:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:34,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:34,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66902867] [2021-05-21 20:33:34,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66902867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:34,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526215666] [2021-05-21 20:33:34,013 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 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 [2021-05-21 20:33:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:34,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:34,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:34,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526215666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:34,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:34,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:34,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753243993] [2021-05-21 20:33:34,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:34,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:34,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:34,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:34,183 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:34,507 INFO L93 Difference]: Finished difference Result 165 states and 325 transitions. [2021-05-21 20:33:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:34,508 INFO L225 Difference]: With dead ends: 165 [2021-05-21 20:33:34,508 INFO L226 Difference]: Without dead ends: 158 [2021-05-21 20:33:34,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-21 20:33:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 96. [2021-05-21 20:33:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-05-21 20:33:34,509 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-05-21 20:33:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:34,510 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-05-21 20:33:34,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-05-21 20:33:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:34,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:34,510 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:34,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:34,726 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1610389644, now seen corresponding path program 50 times [2021-05-21 20:33:34,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:34,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712254745] [2021-05-21 20:33:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:34,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:34,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712254745] [2021-05-21 20:33:34,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712254745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:34,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498593686] [2021-05-21 20:33:34,797 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:33:34,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:34,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:34,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:34,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:34,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498593686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:34,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:34,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:34,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696980021] [2021-05-21 20:33:34,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:34,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:34,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:34,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:34,960 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:35,338 INFO L93 Difference]: Finished difference Result 162 states and 306 transitions. [2021-05-21 20:33:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:33:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:35,339 INFO L225 Difference]: With dead ends: 162 [2021-05-21 20:33:35,339 INFO L226 Difference]: Without dead ends: 148 [2021-05-21 20:33:35,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:33:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-21 20:33:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2021-05-21 20:33:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.02) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 202 transitions. [2021-05-21 20:33:35,341 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 202 transitions. Word has length 17 [2021-05-21 20:33:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:35,341 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 202 transitions. [2021-05-21 20:33:35,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 202 transitions. [2021-05-21 20:33:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:35,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:35,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:35,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 20:33:35,545 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash -79334396, now seen corresponding path program 51 times [2021-05-21 20:33:35,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:35,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673717040] [2021-05-21 20:33:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:35,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:35,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673717040] [2021-05-21 20:33:35,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673717040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:35,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17065096] [2021-05-21 20:33:35,615 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 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 [2021-05-21 20:33:35,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:35,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:35,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:35,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17065096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:35,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:35,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:35,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970167581] [2021-05-21 20:33:35,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:35,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:35,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:35,795 INFO L87 Difference]: Start difference. First operand 101 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:35,973 INFO L93 Difference]: Finished difference Result 121 states and 234 transitions. [2021-05-21 20:33:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:33:35,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:35,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:35,974 INFO L225 Difference]: With dead ends: 121 [2021-05-21 20:33:35,974 INFO L226 Difference]: Without dead ends: 114 [2021-05-21 20:33:35,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:33:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-21 20:33:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-05-21 20:33:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-05-21 20:33:35,975 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-05-21 20:33:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:35,976 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-05-21 20:33:35,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-05-21 20:33:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:35,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:35,976 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:36,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:36,188 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1999959432, now seen corresponding path program 52 times [2021-05-21 20:33:36,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:36,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200363378] [2021-05-21 20:33:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:36,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200363378] [2021-05-21 20:33:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200363378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601934616] [2021-05-21 20:33:36,264 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 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 [2021-05-21 20:33:36,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:36,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:36,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601934616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:36,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:36,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:36,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947511374] [2021-05-21 20:33:36,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:36,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:36,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:36,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:36,451 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:36,766 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-05-21 20:33:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:36,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:36,767 INFO L225 Difference]: With dead ends: 160 [2021-05-21 20:33:36,767 INFO L226 Difference]: Without dead ends: 153 [2021-05-21 20:33:36,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-21 20:33:36,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2021-05-21 20:33:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-05-21 20:33:36,769 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-05-21 20:33:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:36,769 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-05-21 20:33:36,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-05-21 20:33:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:36,769 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:36,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:36,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 20:33:36,970 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:36,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2015420228, now seen corresponding path program 53 times [2021-05-21 20:33:36,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:36,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700703883] [2021-05-21 20:33:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:37,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700703883] [2021-05-21 20:33:37,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700703883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801819525] [2021-05-21 20:33:37,058 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 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 [2021-05-21 20:33:37,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:33:37,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:37,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:37,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:37,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801819525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:37,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:37,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800496716] [2021-05-21 20:33:37,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:37,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:37,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:37,249 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:37,506 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-05-21 20:33:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:37,507 INFO L225 Difference]: With dead ends: 152 [2021-05-21 20:33:37,507 INFO L226 Difference]: Without dead ends: 145 [2021-05-21 20:33:37,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-21 20:33:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2021-05-21 20:33:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 191 transitions. [2021-05-21 20:33:37,508 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 191 transitions. Word has length 17 [2021-05-21 20:33:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:37,508 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 191 transitions. [2021-05-21 20:33:37,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 191 transitions. [2021-05-21 20:33:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:37,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:37,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:37,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 20:33:37,709 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash -148837104, now seen corresponding path program 54 times [2021-05-21 20:33:37,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:37,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781703754] [2021-05-21 20:33:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:37,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781703754] [2021-05-21 20:33:37,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781703754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492526607] [2021-05-21 20:33:37,788 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 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 [2021-05-21 20:33:37,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:37,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:37,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:37,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492526607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:37,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:37,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895983662] [2021-05-21 20:33:37,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:37,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:37,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:37,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:37,931 INFO L87 Difference]: Start difference. First operand 96 states and 191 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:38,137 INFO L93 Difference]: Finished difference Result 155 states and 299 transitions. [2021-05-21 20:33:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:38,138 INFO L225 Difference]: With dead ends: 155 [2021-05-21 20:33:38,138 INFO L226 Difference]: Without dead ends: 148 [2021-05-21 20:33:38,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:33:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-21 20:33:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2021-05-21 20:33:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-05-21 20:33:38,139 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-05-21 20:33:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:38,139 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-05-21 20:33:38,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-05-21 20:33:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:38,140 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:38,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:38,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:38,340 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash -133376308, now seen corresponding path program 55 times [2021-05-21 20:33:38,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:38,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678858793] [2021-05-21 20:33:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:38,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:38,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678858793] [2021-05-21 20:33:38,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678858793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:38,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057253456] [2021-05-21 20:33:38,414 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 [2021-05-21 20:33:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:38,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:38,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057253456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:38,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:38,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:38,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973550007] [2021-05-21 20:33:38,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:38,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:38,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:38,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:38,572 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:38,789 INFO L93 Difference]: Finished difference Result 167 states and 320 transitions. [2021-05-21 20:33:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:38,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:38,789 INFO L225 Difference]: With dead ends: 167 [2021-05-21 20:33:38,790 INFO L226 Difference]: Without dead ends: 160 [2021-05-21 20:33:38,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:33:38,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-21 20:33:38,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2021-05-21 20:33:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-05-21 20:33:38,791 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-05-21 20:33:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:38,791 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-05-21 20:33:38,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-05-21 20:33:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:38,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:38,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:39,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:39,007 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:39,007 INFO L82 PathProgramCache]: Analyzing trace with hash 438078498, now seen corresponding path program 56 times [2021-05-21 20:33:39,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:39,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532460351] [2021-05-21 20:33:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:39,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:39,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532460351] [2021-05-21 20:33:39,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532460351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:39,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671431369] [2021-05-21 20:33:39,091 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 [2021-05-21 20:33:39,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:39,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:39,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671431369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:39,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:39,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 20:33:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93678553] [2021-05-21 20:33:39,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:39,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:39,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:39,234 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:39,435 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-05-21 20:33:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:39,436 INFO L225 Difference]: With dead ends: 128 [2021-05-21 20:33:39,436 INFO L226 Difference]: Without dead ends: 121 [2021-05-21 20:33:39,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-21 20:33:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-05-21 20:33:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-05-21 20:33:39,437 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-05-21 20:33:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:39,437 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-05-21 20:33:39,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-05-21 20:33:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:39,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:39,438 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:39,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:39,645 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash 984287384, now seen corresponding path program 57 times [2021-05-21 20:33:39,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:39,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687298953] [2021-05-21 20:33:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:39,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:39,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687298953] [2021-05-21 20:33:39,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687298953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:39,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464250368] [2021-05-21 20:33:39,728 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 [2021-05-21 20:33:39,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:33:39,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:39,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:39,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:39,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464250368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:39,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:39,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:39,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527098596] [2021-05-21 20:33:39,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:39,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:39,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:39,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:39,886 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:40,114 INFO L93 Difference]: Finished difference Result 163 states and 297 transitions. [2021-05-21 20:33:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:40,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:40,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:40,115 INFO L225 Difference]: With dead ends: 163 [2021-05-21 20:33:40,115 INFO L226 Difference]: Without dead ends: 149 [2021-05-21 20:33:40,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-21 20:33:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2021-05-21 20:33:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 102 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 207 transitions. [2021-05-21 20:33:40,116 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 207 transitions. Word has length 17 [2021-05-21 20:33:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:40,117 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 207 transitions. [2021-05-21 20:33:40,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 207 transitions. [2021-05-21 20:33:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:40,117 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:40,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:40,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:40,321 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash 601566996, now seen corresponding path program 58 times [2021-05-21 20:33:40,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:40,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430366520] [2021-05-21 20:33:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:40,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:40,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430366520] [2021-05-21 20:33:40,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430366520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:40,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402122095] [2021-05-21 20:33:40,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:40,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:40,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:40,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402122095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:40,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:40,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:40,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39946688] [2021-05-21 20:33:40,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:40,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:40,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:40,561 INFO L87 Difference]: Start difference. First operand 103 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:40,856 INFO L93 Difference]: Finished difference Result 144 states and 280 transitions. [2021-05-21 20:33:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:40,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:40,857 INFO L225 Difference]: With dead ends: 144 [2021-05-21 20:33:40,857 INFO L226 Difference]: Without dead ends: 137 [2021-05-21 20:33:40,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 332.0ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-21 20:33:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-05-21 20:33:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-05-21 20:33:40,859 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 17 [2021-05-21 20:33:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:40,859 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-05-21 20:33:40,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-05-21 20:33:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:40,859 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:40,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:41,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:41,075 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1614106472, now seen corresponding path program 59 times [2021-05-21 20:33:41,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:41,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638840044] [2021-05-21 20:33:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:41,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:41,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638840044] [2021-05-21 20:33:41,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638840044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:41,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903876069] [2021-05-21 20:33:41,142 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 [2021-05-21 20:33:41,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:41,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:41,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:41,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903876069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:41,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:41,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:41,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554656973] [2021-05-21 20:33:41,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:41,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:41,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:41,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:41,307 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:41,729 INFO L93 Difference]: Finished difference Result 190 states and 368 transitions. [2021-05-21 20:33:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:33:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:41,730 INFO L225 Difference]: With dead ends: 190 [2021-05-21 20:33:41,730 INFO L226 Difference]: Without dead ends: 183 [2021-05-21 20:33:41,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:33:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-21 20:33:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 105. [2021-05-21 20:33:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-05-21 20:33:41,731 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 17 [2021-05-21 20:33:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:41,731 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-05-21 20:33:41,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-05-21 20:33:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:41,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:41,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:41,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-21 20:33:41,937 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1598645676, now seen corresponding path program 60 times [2021-05-21 20:33:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:41,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032098837] [2021-05-21 20:33:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:42,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:42,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032098837] [2021-05-21 20:33:42,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032098837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:42,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920392618] [2021-05-21 20:33:42,014 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) [2021-05-21 20:33:42,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:42,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:42,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:42,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:42,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920392618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:42,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:42,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:42,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475861] [2021-05-21 20:33:42,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:42,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:42,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:42,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:42,153 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:42,500 INFO L93 Difference]: Finished difference Result 178 states and 352 transitions. [2021-05-21 20:33:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:42,501 INFO L225 Difference]: With dead ends: 178 [2021-05-21 20:33:42,501 INFO L226 Difference]: Without dead ends: 171 [2021-05-21 20:33:42,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-21 20:33:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 102. [2021-05-21 20:33:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 203 transitions. [2021-05-21 20:33:42,503 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 203 transitions. Word has length 17 [2021-05-21 20:33:42,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:42,503 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 203 transitions. [2021-05-21 20:33:42,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 203 transitions. [2021-05-21 20:33:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:42,503 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:42,503 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:42,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-21 20:33:42,704 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:42,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:42,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1614259528, now seen corresponding path program 61 times [2021-05-21 20:33:42,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:42,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321411666] [2021-05-21 20:33:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:42,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:42,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321411666] [2021-05-21 20:33:42,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321411666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:42,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986606287] [2021-05-21 20:33:42,769 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 [2021-05-21 20:33:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:42,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:42,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986606287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:42,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:42,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:42,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239890698] [2021-05-21 20:33:42,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:42,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:42,940 INFO L87 Difference]: Start difference. First operand 102 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:43,140 INFO L93 Difference]: Finished difference Result 130 states and 252 transitions. [2021-05-21 20:33:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:43,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:43,141 INFO L225 Difference]: With dead ends: 130 [2021-05-21 20:33:43,141 INFO L226 Difference]: Without dead ends: 123 [2021-05-21 20:33:43,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-21 20:33:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-05-21 20:33:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-05-21 20:33:43,142 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-05-21 20:33:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:43,143 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-05-21 20:33:43,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-05-21 20:33:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:43,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:43,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:43,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:43,343 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:43,344 INFO L82 PathProgramCache]: Analyzing trace with hash -601413940, now seen corresponding path program 62 times [2021-05-21 20:33:43,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:43,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845994275] [2021-05-21 20:33:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:43,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:43,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845994275] [2021-05-21 20:33:43,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845994275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:43,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431799345] [2021-05-21 20:33:43,416 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 [2021-05-21 20:33:43,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:43,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:43,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:43,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:43,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431799345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:43,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:43,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811459248] [2021-05-21 20:33:43,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:43,579 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:43,898 INFO L93 Difference]: Finished difference Result 174 states and 336 transitions. [2021-05-21 20:33:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:43,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:43,899 INFO L225 Difference]: With dead ends: 174 [2021-05-21 20:33:43,899 INFO L226 Difference]: Without dead ends: 167 [2021-05-21 20:33:43,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-21 20:33:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2021-05-21 20:33:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-05-21 20:33:43,901 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-05-21 20:33:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:43,901 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-05-21 20:33:43,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-05-21 20:33:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:43,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:43,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:44,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-21 20:33:44,117 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:44,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:44,117 INFO L82 PathProgramCache]: Analyzing trace with hash -585953144, now seen corresponding path program 63 times [2021-05-21 20:33:44,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:44,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285486804] [2021-05-21 20:33:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:44,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:44,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285486804] [2021-05-21 20:33:44,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285486804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:44,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845121718] [2021-05-21 20:33:44,185 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 [2021-05-21 20:33:44,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:44,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:44,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:44,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845121718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:44,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:44,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:44,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553229713] [2021-05-21 20:33:44,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:44,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:44,330 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:44,597 INFO L93 Difference]: Finished difference Result 164 states and 323 transitions. [2021-05-21 20:33:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:44,598 INFO L225 Difference]: With dead ends: 164 [2021-05-21 20:33:44,598 INFO L226 Difference]: Without dead ends: 157 [2021-05-21 20:33:44,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:44,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-21 20:33:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2021-05-21 20:33:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-05-21 20:33:44,599 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 17 [2021-05-21 20:33:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:44,599 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-05-21 20:33:44,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-05-21 20:33:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:44,600 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:44,600 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:44,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-21 20:33:44,800 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:44,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1544756820, now seen corresponding path program 64 times [2021-05-21 20:33:44,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:44,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157726126] [2021-05-21 20:33:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:44,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:44,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157726126] [2021-05-21 20:33:44,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157726126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:44,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112979182] [2021-05-21 20:33:44,866 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 [2021-05-21 20:33:44,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:44,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:44,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:44,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:45,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112979182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:45,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:45,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:45,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118700869] [2021-05-21 20:33:45,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:45,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:45,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:45,012 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:45,271 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-05-21 20:33:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:45,272 INFO L225 Difference]: With dead ends: 172 [2021-05-21 20:33:45,272 INFO L226 Difference]: Without dead ends: 165 [2021-05-21 20:33:45,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-21 20:33:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2021-05-21 20:33:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-05-21 20:33:45,274 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-05-21 20:33:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:45,274 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-05-21 20:33:45,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-05-21 20:33:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:45,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:45,274 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:45,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-05-21 20:33:45,489 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1560217616, now seen corresponding path program 65 times [2021-05-21 20:33:45,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:45,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260739096] [2021-05-21 20:33:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:45,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:45,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260739096] [2021-05-21 20:33:45,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260739096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:45,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023637865] [2021-05-21 20:33:45,553 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 [2021-05-21 20:33:45,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:45,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:45,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:45,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:45,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023637865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:45,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:45,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:45,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637584990] [2021-05-21 20:33:45,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:45,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:45,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:45,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:45,704 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:45,931 INFO L93 Difference]: Finished difference Result 186 states and 358 transitions. [2021-05-21 20:33:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:45,931 INFO L225 Difference]: With dead ends: 186 [2021-05-21 20:33:45,931 INFO L226 Difference]: Without dead ends: 179 [2021-05-21 20:33:45,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-21 20:33:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 104. [2021-05-21 20:33:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-05-21 20:33:45,933 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-05-21 20:33:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:45,933 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-05-21 20:33:45,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-05-21 20:33:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:45,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:45,934 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:46,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:46,145 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:46,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2131672422, now seen corresponding path program 66 times [2021-05-21 20:33:46,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:46,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416738695] [2021-05-21 20:33:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:46,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416738695] [2021-05-21 20:33:46,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416738695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:46,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632884247] [2021-05-21 20:33:46,208 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 [2021-05-21 20:33:46,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:46,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:46,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:46,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:46,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632884247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:46,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:46,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:46,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040352056] [2021-05-21 20:33:46,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:46,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:46,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:46,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:46,387 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:46,632 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2021-05-21 20:33:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:46,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:46,633 INFO L225 Difference]: With dead ends: 143 [2021-05-21 20:33:46,633 INFO L226 Difference]: Without dead ends: 136 [2021-05-21 20:33:46,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-21 20:33:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-05-21 20:33:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 200 transitions. [2021-05-21 20:33:46,635 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 200 transitions. Word has length 17 [2021-05-21 20:33:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:46,635 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 200 transitions. [2021-05-21 20:33:46,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 200 transitions. [2021-05-21 20:33:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:46,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:46,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:46,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:46,849 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1794909488, now seen corresponding path program 67 times [2021-05-21 20:33:46,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:46,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402455766] [2021-05-21 20:33:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:46,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:46,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402455766] [2021-05-21 20:33:46,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402455766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:46,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508071755] [2021-05-21 20:33:46,926 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 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 [2021-05-21 20:33:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:47,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508071755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:47,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:47,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:47,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231356337] [2021-05-21 20:33:47,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:47,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:47,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:47,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:47,080 INFO L87 Difference]: Start difference. First operand 101 states and 200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:47,220 INFO L93 Difference]: Finished difference Result 111 states and 213 transitions. [2021-05-21 20:33:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:33:47,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:47,221 INFO L225 Difference]: With dead ends: 111 [2021-05-21 20:33:47,221 INFO L226 Difference]: Without dead ends: 104 [2021-05-21 20:33:47,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-21 20:33:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-05-21 20:33:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-05-21 20:33:47,222 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-05-21 20:33:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:47,222 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-05-21 20:33:47,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-05-21 20:33:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:47,223 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:47,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:47,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:47,437 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash 284384340, now seen corresponding path program 68 times [2021-05-21 20:33:47,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:47,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069606933] [2021-05-21 20:33:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:47,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:47,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069606933] [2021-05-21 20:33:47,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069606933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:47,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58880115] [2021-05-21 20:33:47,504 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 [2021-05-21 20:33:47,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:47,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:47,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:47,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58880115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:47,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:47,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:47,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037607389] [2021-05-21 20:33:47,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:47,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:47,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:47,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:47,673 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:47,987 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-05-21 20:33:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:47,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:47,988 INFO L225 Difference]: With dead ends: 144 [2021-05-21 20:33:47,988 INFO L226 Difference]: Without dead ends: 137 [2021-05-21 20:33:47,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-21 20:33:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-05-21 20:33:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-05-21 20:33:47,990 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-05-21 20:33:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:47,990 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-05-21 20:33:47,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-05-21 20:33:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:47,990 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:47,990 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:48,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-21 20:33:48,205 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:48,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:48,205 INFO L82 PathProgramCache]: Analyzing trace with hash 299845136, now seen corresponding path program 69 times [2021-05-21 20:33:48,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:48,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53638918] [2021-05-21 20:33:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:48,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:48,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53638918] [2021-05-21 20:33:48,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53638918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:48,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949757634] [2021-05-21 20:33:48,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:33:48,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:48,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:48,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:48,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:48,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949757634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:48,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:48,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:48,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601625450] [2021-05-21 20:33:48,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:48,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:48,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:48,455 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:48,666 INFO L93 Difference]: Finished difference Result 139 states and 270 transitions. [2021-05-21 20:33:48,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:33:48,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:48,667 INFO L225 Difference]: With dead ends: 139 [2021-05-21 20:33:48,667 INFO L226 Difference]: Without dead ends: 132 [2021-05-21 20:33:48,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-21 20:33:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-05-21 20:33:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 189 transitions. [2021-05-21 20:33:48,669 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 189 transitions. Word has length 17 [2021-05-21 20:33:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:48,669 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 189 transitions. [2021-05-21 20:33:48,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 189 transitions. [2021-05-21 20:33:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:48,669 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:48,669 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:48,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:48,870 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:48,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1864412196, now seen corresponding path program 70 times [2021-05-21 20:33:48,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:48,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776023070] [2021-05-21 20:33:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:48,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:48,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776023070] [2021-05-21 20:33:48,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776023070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:48,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162052412] [2021-05-21 20:33:48,942 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 [2021-05-21 20:33:48,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:48,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:48,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:49,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162052412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:49,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:49,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:49,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632563783] [2021-05-21 20:33:49,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:49,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:49,113 INFO L87 Difference]: Start difference. First operand 96 states and 189 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:49,343 INFO L93 Difference]: Finished difference Result 140 states and 268 transitions. [2021-05-21 20:33:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:49,344 INFO L225 Difference]: With dead ends: 140 [2021-05-21 20:33:49,344 INFO L226 Difference]: Without dead ends: 133 [2021-05-21 20:33:49,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-21 20:33:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-05-21 20:33:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-05-21 20:33:49,346 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-05-21 20:33:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:49,346 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-05-21 20:33:49,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-05-21 20:33:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:49,346 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:49,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:49,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:49,547 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:49,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:49,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1848951400, now seen corresponding path program 71 times [2021-05-21 20:33:49,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:49,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644450030] [2021-05-21 20:33:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:49,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:49,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644450030] [2021-05-21 20:33:49,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644450030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:49,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072416931] [2021-05-21 20:33:49,627 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 [2021-05-21 20:33:49,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:49,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:49,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:49,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072416931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:49,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:49,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:49,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998618890] [2021-05-21 20:33:49,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:49,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:49,778 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:49,972 INFO L93 Difference]: Finished difference Result 151 states and 289 transitions. [2021-05-21 20:33:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:49,973 INFO L225 Difference]: With dead ends: 151 [2021-05-21 20:33:49,973 INFO L226 Difference]: Without dead ends: 144 [2021-05-21 20:33:49,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-21 20:33:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2021-05-21 20:33:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-05-21 20:33:49,974 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-05-21 20:33:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:49,974 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-05-21 20:33:49,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-05-21 20:33:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:49,975 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:49,975 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:50,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-21 20:33:50,175 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1277496594, now seen corresponding path program 72 times [2021-05-21 20:33:50,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:50,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257655819] [2021-05-21 20:33:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:50,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:50,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257655819] [2021-05-21 20:33:50,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257655819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:50,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680041918] [2021-05-21 20:33:50,241 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 [2021-05-21 20:33:50,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:50,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:50,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:50,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680041918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:50,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:50,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:50,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616101203] [2021-05-21 20:33:50,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:50,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:50,407 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:50,586 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-05-21 20:33:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:33:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:50,587 INFO L225 Difference]: With dead ends: 124 [2021-05-21 20:33:50,587 INFO L226 Difference]: Without dead ends: 117 [2021-05-21 20:33:50,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-21 20:33:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-05-21 20:33:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-05-21 20:33:50,589 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-05-21 20:33:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:50,589 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-05-21 20:33:50,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-05-21 20:33:50,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:50,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:50,589 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:50,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-21 20:33:50,790 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:50,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1336463512, now seen corresponding path program 73 times [2021-05-21 20:33:50,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:50,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130523682] [2021-05-21 20:33:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:50,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:50,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130523682] [2021-05-21 20:33:50,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130523682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:50,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329768044] [2021-05-21 20:33:50,860 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 [2021-05-21 20:33:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:50,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:50,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:51,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329768044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:51,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:51,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:51,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68234555] [2021-05-21 20:33:51,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:51,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:51,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:51,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:51,019 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:51,280 INFO L93 Difference]: Finished difference Result 157 states and 300 transitions. [2021-05-21 20:33:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:51,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:51,281 INFO L225 Difference]: With dead ends: 157 [2021-05-21 20:33:51,281 INFO L226 Difference]: Without dead ends: 150 [2021-05-21 20:33:51,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-21 20:33:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2021-05-21 20:33:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-05-21 20:33:51,282 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-05-21 20:33:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:51,282 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-05-21 20:33:51,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-05-21 20:33:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:51,283 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:51,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:51,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:51,483 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:51,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1351924308, now seen corresponding path program 74 times [2021-05-21 20:33:51,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:51,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638372217] [2021-05-21 20:33:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:51,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:51,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638372217] [2021-05-21 20:33:51,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638372217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:51,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882175590] [2021-05-21 20:33:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:33:51,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:51,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:51,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:51,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882175590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:51,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:51,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:51,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708812385] [2021-05-21 20:33:51,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:51,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:51,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:51,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:51,714 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:52,086 INFO L93 Difference]: Finished difference Result 169 states and 323 transitions. [2021-05-21 20:33:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:52,087 INFO L225 Difference]: With dead ends: 169 [2021-05-21 20:33:52,087 INFO L226 Difference]: Without dead ends: 162 [2021-05-21 20:33:52,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-21 20:33:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-05-21 20:33:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-05-21 20:33:52,088 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 17 [2021-05-21 20:33:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:52,089 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-05-21 20:33:52,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-05-21 20:33:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:52,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:52,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:52,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:52,305 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1923379114, now seen corresponding path program 75 times [2021-05-21 20:33:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:52,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672235458] [2021-05-21 20:33:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:52,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:52,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672235458] [2021-05-21 20:33:52,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672235458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:52,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54481544] [2021-05-21 20:33:52,369 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 [2021-05-21 20:33:52,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:52,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:52,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:52,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:52,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54481544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:52,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:52,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:52,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648873071] [2021-05-21 20:33:52,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:52,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:52,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:52,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:52,527 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:52,794 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-05-21 20:33:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:52,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:52,795 INFO L225 Difference]: With dead ends: 141 [2021-05-21 20:33:52,795 INFO L226 Difference]: Without dead ends: 134 [2021-05-21 20:33:52,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-21 20:33:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-05-21 20:33:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-05-21 20:33:52,796 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-05-21 20:33:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:52,796 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-05-21 20:33:52,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-05-21 20:33:52,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:52,797 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:52,797 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:53,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:53,012 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash 762400792, now seen corresponding path program 4 times [2021-05-21 20:33:53,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:53,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570625390] [2021-05-21 20:33:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:53,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:53,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570625390] [2021-05-21 20:33:53,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570625390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:53,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944816939] [2021-05-21 20:33:53,073 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 [2021-05-21 20:33:53,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:53,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:33:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:53,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944816939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:53,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:53,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-21 20:33:53,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724052645] [2021-05-21 20:33:53,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:53,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:53,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:53,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:53,156 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:53,293 INFO L93 Difference]: Finished difference Result 130 states and 253 transitions. [2021-05-21 20:33:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:33:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:53,294 INFO L225 Difference]: With dead ends: 130 [2021-05-21 20:33:53,294 INFO L226 Difference]: Without dead ends: 119 [2021-05-21 20:33:53,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-21 20:33:53,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-05-21 20:33:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-05-21 20:33:53,296 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 17 [2021-05-21 20:33:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:53,296 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-05-21 20:33:53,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-05-21 20:33:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:53,296 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:53,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:53,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:53,511 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1385523536, now seen corresponding path program 76 times [2021-05-21 20:33:53,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:53,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369610173] [2021-05-21 20:33:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:53,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:53,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369610173] [2021-05-21 20:33:53,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369610173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:53,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879062551] [2021-05-21 20:33:53,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:53,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:53,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:53,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:33:53,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:53,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879062551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:53,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:53,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 20:33:53,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871544376] [2021-05-21 20:33:53,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:33:53,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:33:53,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:53,732 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:54,083 INFO L93 Difference]: Finished difference Result 153 states and 289 transitions. [2021-05-21 20:33:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:54,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:54,084 INFO L225 Difference]: With dead ends: 153 [2021-05-21 20:33:54,084 INFO L226 Difference]: Without dead ends: 139 [2021-05-21 20:33:54,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:33:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-21 20:33:54,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2021-05-21 20:33:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 197 transitions. [2021-05-21 20:33:54,086 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 197 transitions. Word has length 17 [2021-05-21 20:33:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:54,086 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 197 transitions. [2021-05-21 20:33:54,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 197 transitions. [2021-05-21 20:33:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:54,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:54,087 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:54,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:54,287 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:54,287 INFO L82 PathProgramCache]: Analyzing trace with hash 255431194, now seen corresponding path program 4 times [2021-05-21 20:33:54,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:54,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201640137] [2021-05-21 20:33:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:54,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:54,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201640137] [2021-05-21 20:33:54,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201640137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:54,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118040631] [2021-05-21 20:33:54,361 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 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 [2021-05-21 20:33:54,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:54,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:33:54,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:54,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118040631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:54,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:54,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:33:54,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742410740] [2021-05-21 20:33:54,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:54,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:54,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:54,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:54,474 INFO L87 Difference]: Start difference. First operand 100 states and 197 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-05-21 20:33:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:54,669 INFO L93 Difference]: Finished difference Result 132 states and 257 transitions. [2021-05-21 20:33:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:33:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 19 [2021-05-21 20:33:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:54,670 INFO L225 Difference]: With dead ends: 132 [2021-05-21 20:33:54,670 INFO L226 Difference]: Without dead ends: 119 [2021-05-21 20:33:54,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-21 20:33:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2021-05-21 20:33:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-05-21 20:33:54,672 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-05-21 20:33:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:54,672 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-05-21 20:33:54,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-05-21 20:33:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-05-21 20:33:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:54,673 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:54,673 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:54,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-05-21 20:33:54,887 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2015204966, now seen corresponding path program 77 times [2021-05-21 20:33:54,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:54,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384795649] [2021-05-21 20:33:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:54,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:54,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384795649] [2021-05-21 20:33:54,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384795649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:54,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831514508] [2021-05-21 20:33:54,968 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 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 [2021-05-21 20:33:54,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:33:54,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:54,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:33:54,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:55,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831514508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:55,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:55,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:33:55,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215494169] [2021-05-21 20:33:55,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:33:55,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:33:55,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:55,151 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:55,426 INFO L93 Difference]: Finished difference Result 136 states and 260 transitions. [2021-05-21 20:33:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:33:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:55,427 INFO L225 Difference]: With dead ends: 136 [2021-05-21 20:33:55,427 INFO L226 Difference]: Without dead ends: 129 [2021-05-21 20:33:55,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:33:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-21 20:33:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2021-05-21 20:33:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-05-21 20:33:55,429 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-05-21 20:33:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:55,429 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-05-21 20:33:55,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-05-21 20:33:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:55,429 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:55,429 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:55,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:55,630 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1897041942, now seen corresponding path program 78 times [2021-05-21 20:33:55,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:55,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418402809] [2021-05-21 20:33:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:55,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:55,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418402809] [2021-05-21 20:33:55,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418402809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:55,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663078145] [2021-05-21 20:33:55,712 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 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 [2021-05-21 20:33:55,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:33:55,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:55,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:33:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:55,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663078145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:55,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:55,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:33:55,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058101354] [2021-05-21 20:33:55,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:33:55,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:55,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:33:55,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:55,894 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:56,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:56,199 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-05-21 20:33:56,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:56,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:33:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:56,200 INFO L225 Difference]: With dead ends: 141 [2021-05-21 20:33:56,200 INFO L226 Difference]: Without dead ends: 134 [2021-05-21 20:33:56,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-21 20:33:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-05-21 20:33:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-05-21 20:33:56,204 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-05-21 20:33:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:56,204 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-05-21 20:33:56,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-05-21 20:33:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:56,204 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:56,204 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:56,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-21 20:33:56,420 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:56,420 INFO L82 PathProgramCache]: Analyzing trace with hash -318631526, now seen corresponding path program 79 times [2021-05-21 20:33:56,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:56,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852369543] [2021-05-21 20:33:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:56,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:56,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852369543] [2021-05-21 20:33:56,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852369543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:56,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226837144] [2021-05-21 20:33:56,522 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 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 [2021-05-21 20:33:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:56,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:33:56,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:56,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226837144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:56,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:56,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:33:56,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476518986] [2021-05-21 20:33:56,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:33:56,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:56,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:33:56,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:56,690 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:56,971 INFO L93 Difference]: Finished difference Result 167 states and 318 transitions. [2021-05-21 20:33:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:33:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:56,972 INFO L225 Difference]: With dead ends: 167 [2021-05-21 20:33:56,972 INFO L226 Difference]: Without dead ends: 160 [2021-05-21 20:33:56,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-21 20:33:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2021-05-21 20:33:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-05-21 20:33:56,973 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-05-21 20:33:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:56,973 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-05-21 20:33:56,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-05-21 20:33:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:56,974 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:56,974 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:57,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-21 20:33:57,174 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:57,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:57,174 INFO L82 PathProgramCache]: Analyzing trace with hash -303170730, now seen corresponding path program 80 times [2021-05-21 20:33:57,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:57,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014333789] [2021-05-21 20:33:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:57,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:57,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014333789] [2021-05-21 20:33:57,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014333789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:57,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217376779] [2021-05-21 20:33:57,264 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 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 [2021-05-21 20:33:57,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:57,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:57,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:33:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:57,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217376779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:57,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:57,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:33:57,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437576291] [2021-05-21 20:33:57,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:33:57,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:57,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:33:57,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:57,461 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:57,816 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-05-21 20:33:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:33:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:57,817 INFO L225 Difference]: With dead ends: 150 [2021-05-21 20:33:57,817 INFO L226 Difference]: Without dead ends: 143 [2021-05-21 20:33:57,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-21 20:33:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2021-05-21 20:33:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 204 transitions. [2021-05-21 20:33:57,818 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 204 transitions. Word has length 19 [2021-05-21 20:33:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:57,818 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 204 transitions. [2021-05-21 20:33:57,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 204 transitions. [2021-05-21 20:33:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:57,819 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:57,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:58,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:58,034 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:58,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1454735530, now seen corresponding path program 81 times [2021-05-21 20:33:58,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:58,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770703603] [2021-05-21 20:33:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:58,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770703603] [2021-05-21 20:33:58,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770703603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122085907] [2021-05-21 20:33:58,117 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 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 [2021-05-21 20:33:58,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:33:58,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:58,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:33:58,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:58,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122085907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:58,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:58,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:33:58,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132456616] [2021-05-21 20:33:58,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:33:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:33:58,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:58,292 INFO L87 Difference]: Start difference. First operand 103 states and 204 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:58,588 INFO L93 Difference]: Finished difference Result 158 states and 304 transitions. [2021-05-21 20:33:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:58,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:33:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:58,589 INFO L225 Difference]: With dead ends: 158 [2021-05-21 20:33:58,589 INFO L226 Difference]: Without dead ends: 151 [2021-05-21 20:33:58,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-21 20:33:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2021-05-21 20:33:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-05-21 20:33:58,590 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-05-21 20:33:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:58,590 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-05-21 20:33:58,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:58,590 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-05-21 20:33:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:58,591 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:58,591 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:58,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:58,797 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:58,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:58,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1439274734, now seen corresponding path program 82 times [2021-05-21 20:33:58,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:58,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702810703] [2021-05-21 20:33:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:58,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:58,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702810703] [2021-05-21 20:33:58,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702810703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:58,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093428089] [2021-05-21 20:33:58,880 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 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 [2021-05-21 20:33:58,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:58,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:58,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:33:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:59,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093428089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:59,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:59,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:33:59,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038210124] [2021-05-21 20:33:59,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:33:59,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:33:59,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:59,081 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:59,373 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-05-21 20:33:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:33:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:59,374 INFO L225 Difference]: With dead ends: 160 [2021-05-21 20:33:59,374 INFO L226 Difference]: Without dead ends: 153 [2021-05-21 20:33:59,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-21 20:33:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-05-21 20:33:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-05-21 20:33:59,376 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-05-21 20:33:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:59,376 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-05-21 20:33:59,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:33:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-05-21 20:33:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:59,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:59,376 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:59,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:59,577 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:59,577 INFO L82 PathProgramCache]: Analyzing trace with hash -867819928, now seen corresponding path program 83 times [2021-05-21 20:33:59,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:59,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722881526] [2021-05-21 20:33:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:59,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:59,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722881526] [2021-05-21 20:33:59,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722881526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:59,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792690089] [2021-05-21 20:33:59,654 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:33:59,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:33:59,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:59,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:33:59,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:59,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792690089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:59,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:59,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:33:59,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975613471] [2021-05-21 20:33:59,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:33:59,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:59,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:33:59,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:59,889 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:00,087 INFO L93 Difference]: Finished difference Result 127 states and 246 transitions. [2021-05-21 20:34:00,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:00,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:00,088 INFO L225 Difference]: With dead ends: 127 [2021-05-21 20:34:00,088 INFO L226 Difference]: Without dead ends: 120 [2021-05-21 20:34:00,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-21 20:34:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-05-21 20:34:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-05-21 20:34:00,090 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-05-21 20:34:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:00,090 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-05-21 20:34:00,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-05-21 20:34:00,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:00,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:00,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:00,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:00,306 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2041798938, now seen corresponding path program 84 times [2021-05-21 20:34:00,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:00,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038055936] [2021-05-21 20:34:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:00,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:00,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038055936] [2021-05-21 20:34:00,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038055936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:00,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589191542] [2021-05-21 20:34:00,385 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 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 [2021-05-21 20:34:00,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:34:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:00,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:00,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589191542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:00,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:00,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:00,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861593009] [2021-05-21 20:34:00,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:00,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:00,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:00,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:00,599 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:00,765 INFO L93 Difference]: Finished difference Result 125 states and 240 transitions. [2021-05-21 20:34:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:00,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:00,765 INFO L225 Difference]: With dead ends: 125 [2021-05-21 20:34:00,765 INFO L226 Difference]: Without dead ends: 118 [2021-05-21 20:34:00,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-21 20:34:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-05-21 20:34:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-05-21 20:34:00,767 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 19 [2021-05-21 20:34:00,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:00,767 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-05-21 20:34:00,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:00,767 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-05-21 20:34:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:00,767 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:00,767 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:00,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:00,968 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash -499434542, now seen corresponding path program 85 times [2021-05-21 20:34:00,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:00,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390451299] [2021-05-21 20:34:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:01,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:01,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390451299] [2021-05-21 20:34:01,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390451299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:01,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593273314] [2021-05-21 20:34:01,052 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 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 [2021-05-21 20:34:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:01,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:01,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593273314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:01,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:01,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:01,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405682548] [2021-05-21 20:34:01,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:01,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:01,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:01,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:01,237 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:01,585 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-05-21 20:34:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:34:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:01,586 INFO L225 Difference]: With dead ends: 137 [2021-05-21 20:34:01,586 INFO L226 Difference]: Without dead ends: 130 [2021-05-21 20:34:01,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 382.0ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-21 20:34:01,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2021-05-21 20:34:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-05-21 20:34:01,587 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-05-21 20:34:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:01,587 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-05-21 20:34:01,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-05-21 20:34:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:01,588 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:01,588 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:01,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:01,801 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:01,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859286, now seen corresponding path program 86 times [2021-05-21 20:34:01,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:01,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071967307] [2021-05-21 20:34:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:01,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:01,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071967307] [2021-05-21 20:34:01,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071967307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:01,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971837293] [2021-05-21 20:34:01,886 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 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 [2021-05-21 20:34:01,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:01,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:01,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:02,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971837293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:02,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:02,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:02,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973207294] [2021-05-21 20:34:02,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:02,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:02,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:02,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:02,076 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:02,437 INFO L93 Difference]: Finished difference Result 192 states and 369 transitions. [2021-05-21 20:34:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:34:02,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:02,438 INFO L225 Difference]: With dead ends: 192 [2021-05-21 20:34:02,438 INFO L226 Difference]: Without dead ends: 185 [2021-05-21 20:34:02,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:34:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-21 20:34:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2021-05-21 20:34:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-05-21 20:34:02,439 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-05-21 20:34:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:02,439 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-05-21 20:34:02,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-05-21 20:34:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:02,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:02,440 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:02,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:02,655 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:02,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1595320082, now seen corresponding path program 87 times [2021-05-21 20:34:02,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:02,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987546030] [2021-05-21 20:34:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:02,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987546030] [2021-05-21 20:34:02,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987546030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665594696] [2021-05-21 20:34:02,743 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 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 [2021-05-21 20:34:02,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:34:02,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:02,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:02,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:02,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665594696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:02,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:02,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:02,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355447265] [2021-05-21 20:34:02,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:02,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:02,943 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:03,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:03,393 INFO L93 Difference]: Finished difference Result 176 states and 346 transitions. [2021-05-21 20:34:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:34:03,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:03,394 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:34:03,394 INFO L226 Difference]: Without dead ends: 169 [2021-05-21 20:34:03,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:34:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-21 20:34:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2021-05-21 20:34:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-05-21 20:34:03,395 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 19 [2021-05-21 20:34:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:03,395 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-05-21 20:34:03,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-05-21 20:34:03,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:03,396 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:03,396 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:03,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:03,596 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:03,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:03,596 INFO L82 PathProgramCache]: Analyzing trace with hash -568937250, now seen corresponding path program 88 times [2021-05-21 20:34:03,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:03,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998313342] [2021-05-21 20:34:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:03,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:03,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998313342] [2021-05-21 20:34:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998313342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:03,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843595821] [2021-05-21 20:34:03,681 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 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 [2021-05-21 20:34:03,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:03,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:03,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:03,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843595821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:03,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:03,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:03,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668312262] [2021-05-21 20:34:03,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:03,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:03,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:03,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:03,855 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:04,280 INFO L93 Difference]: Finished difference Result 198 states and 383 transitions. [2021-05-21 20:34:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:34:04,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:04,281 INFO L225 Difference]: With dead ends: 198 [2021-05-21 20:34:04,281 INFO L226 Difference]: Without dead ends: 191 [2021-05-21 20:34:04,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-21 20:34:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2021-05-21 20:34:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-05-21 20:34:04,283 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-05-21 20:34:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:04,283 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-05-21 20:34:04,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-05-21 20:34:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:04,283 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:04,283 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:04,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-21 20:34:04,484 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:04,484 INFO L82 PathProgramCache]: Analyzing trace with hash -553476454, now seen corresponding path program 89 times [2021-05-21 20:34:04,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:04,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865062720] [2021-05-21 20:34:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:04,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865062720] [2021-05-21 20:34:04,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865062720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194809201] [2021-05-21 20:34:04,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:34:04,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:34:04,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:04,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:04,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194809201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:04,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:04,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:04,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094569912] [2021-05-21 20:34:04,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:04,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:04,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:04,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:04,792 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:05,275 INFO L93 Difference]: Finished difference Result 209 states and 402 transitions. [2021-05-21 20:34:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:34:05,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:05,276 INFO L225 Difference]: With dead ends: 209 [2021-05-21 20:34:05,276 INFO L226 Difference]: Without dead ends: 202 [2021-05-21 20:34:05,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 491.0ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:34:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-21 20:34:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 107. [2021-05-21 20:34:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-05-21 20:34:05,277 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-05-21 20:34:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:05,278 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-05-21 20:34:05,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-05-21 20:34:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:05,278 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:05,278 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:05,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:05,478 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:05,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:05,479 INFO L82 PathProgramCache]: Analyzing trace with hash 17978352, now seen corresponding path program 90 times [2021-05-21 20:34:05,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:05,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569873492] [2021-05-21 20:34:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:05,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:05,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569873492] [2021-05-21 20:34:05,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569873492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:05,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049091672] [2021-05-21 20:34:05,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:34:05,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:05,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:05,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:05,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:05,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049091672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:05,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:05,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:05,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280774506] [2021-05-21 20:34:05,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:05,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:05,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:05,765 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:06,152 INFO L93 Difference]: Finished difference Result 156 states and 301 transitions. [2021-05-21 20:34:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:34:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:06,153 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:34:06,153 INFO L226 Difference]: Without dead ends: 149 [2021-05-21 20:34:06,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-21 20:34:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 105. [2021-05-21 20:34:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.019230769230769) internal successors, (210), 104 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 210 transitions. [2021-05-21 20:34:06,155 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 210 transitions. Word has length 19 [2021-05-21 20:34:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:06,155 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 210 transitions. [2021-05-21 20:34:06,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 210 transitions. [2021-05-21 20:34:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:06,155 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:06,155 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:06,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:06,370 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:06,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:06,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1663028838, now seen corresponding path program 91 times [2021-05-21 20:34:06,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:06,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281540018] [2021-05-21 20:34:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:06,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281540018] [2021-05-21 20:34:06,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281540018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479837557] [2021-05-21 20:34:06,468 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 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 [2021-05-21 20:34:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:06,488 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:06,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:06,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479837557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:06,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:06,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:06,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354467913] [2021-05-21 20:34:06,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:06,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:06,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:06,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:06,648 INFO L87 Difference]: Start difference. First operand 105 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:07,207 INFO L93 Difference]: Finished difference Result 231 states and 445 transitions. [2021-05-21 20:34:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:34:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:07,208 INFO L225 Difference]: With dead ends: 231 [2021-05-21 20:34:07,208 INFO L226 Difference]: Without dead ends: 224 [2021-05-21 20:34:07,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:34:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-21 20:34:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 108. [2021-05-21 20:34:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-05-21 20:34:07,210 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-05-21 20:34:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:07,210 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-05-21 20:34:07,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-05-21 20:34:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:07,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:07,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:07,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-21 20:34:07,426 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:07,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:07,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1647568042, now seen corresponding path program 92 times [2021-05-21 20:34:07,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:07,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684446864] [2021-05-21 20:34:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:07,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:07,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684446864] [2021-05-21 20:34:07,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684446864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:07,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131110185] [2021-05-21 20:34:07,514 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 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 [2021-05-21 20:34:07,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:07,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:07,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131110185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:07,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:07,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:07,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208075530] [2021-05-21 20:34:07,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:07,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:07,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:07,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:07,691 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:08,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:08,262 INFO L93 Difference]: Finished difference Result 245 states and 469 transitions. [2021-05-21 20:34:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:34:08,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:08,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:08,263 INFO L225 Difference]: With dead ends: 245 [2021-05-21 20:34:08,264 INFO L226 Difference]: Without dead ends: 238 [2021-05-21 20:34:08,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:34:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-21 20:34:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 107. [2021-05-21 20:34:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-05-21 20:34:08,265 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-05-21 20:34:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:08,265 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-05-21 20:34:08,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-05-21 20:34:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:08,268 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:08,268 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:08,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-21 20:34:08,481 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1076113236, now seen corresponding path program 93 times [2021-05-21 20:34:08,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:08,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644544869] [2021-05-21 20:34:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:08,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:08,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644544869] [2021-05-21 20:34:08,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644544869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:08,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879524760] [2021-05-21 20:34:08,557 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 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 [2021-05-21 20:34:08,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:34:08,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:08,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:08,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879524760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:08,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:08,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:08,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988694688] [2021-05-21 20:34:08,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:08,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:08,765 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:09,209 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-05-21 20:34:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:34:09,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:09,209 INFO L225 Difference]: With dead ends: 193 [2021-05-21 20:34:09,209 INFO L226 Difference]: Without dead ends: 186 [2021-05-21 20:34:09,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 429.9ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:34:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-21 20:34:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 106. [2021-05-21 20:34:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-05-21 20:34:09,211 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-05-21 20:34:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:09,211 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-05-21 20:34:09,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-05-21 20:34:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:09,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:09,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:09,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 20:34:09,417 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash 361302298, now seen corresponding path program 94 times [2021-05-21 20:34:09,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:09,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24830822] [2021-05-21 20:34:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:09,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:09,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24830822] [2021-05-21 20:34:09,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24830822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:09,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122938977] [2021-05-21 20:34:09,500 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 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 [2021-05-21 20:34:09,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:09,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:09,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:09,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122938977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:09,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:09,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:09,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097425341] [2021-05-21 20:34:09,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:09,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:09,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:09,726 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:09,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:09,944 INFO L93 Difference]: Finished difference Result 142 states and 271 transitions. [2021-05-21 20:34:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:09,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:09,945 INFO L225 Difference]: With dead ends: 142 [2021-05-21 20:34:09,945 INFO L226 Difference]: Without dead ends: 135 [2021-05-21 20:34:09,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-21 20:34:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-05-21 20:34:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-05-21 20:34:09,951 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-05-21 20:34:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:09,951 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-05-21 20:34:09,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-05-21 20:34:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:09,951 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:09,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:10,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 20:34:10,157 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:10,157 INFO L82 PathProgramCache]: Analyzing trace with hash -21418090, now seen corresponding path program 95 times [2021-05-21 20:34:10,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:10,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792895265] [2021-05-21 20:34:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:10,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:10,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792895265] [2021-05-21 20:34:10,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792895265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:10,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997297674] [2021-05-21 20:34:10,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:34:10,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:34:10,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:10,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:10,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997297674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:10,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:10,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:10,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822001] [2021-05-21 20:34:10,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:10,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:10,446 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:10,636 INFO L93 Difference]: Finished difference Result 139 states and 267 transitions. [2021-05-21 20:34:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:34:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:10,637 INFO L225 Difference]: With dead ends: 139 [2021-05-21 20:34:10,637 INFO L226 Difference]: Without dead ends: 132 [2021-05-21 20:34:10,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-21 20:34:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-05-21 20:34:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-05-21 20:34:10,638 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-05-21 20:34:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:10,638 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-05-21 20:34:10,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-05-21 20:34:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:10,638 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:10,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:10,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-21 20:34:10,843 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:10,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2057875738, now seen corresponding path program 96 times [2021-05-21 20:34:10,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:10,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321332716] [2021-05-21 20:34:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:10,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:10,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321332716] [2021-05-21 20:34:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321332716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:10,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042214418] [2021-05-21 20:34:10,925 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 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 [2021-05-21 20:34:10,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:34:10,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:10,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:11,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042214418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:11,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:11,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:11,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551909070] [2021-05-21 20:34:11,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:11,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:11,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:11,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:11,132 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:11,440 INFO L93 Difference]: Finished difference Result 165 states and 315 transitions. [2021-05-21 20:34:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:34:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:11,440 INFO L225 Difference]: With dead ends: 165 [2021-05-21 20:34:11,441 INFO L226 Difference]: Without dead ends: 158 [2021-05-21 20:34:11,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-21 20:34:11,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-05-21 20:34:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-05-21 20:34:11,442 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-05-21 20:34:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:11,442 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-05-21 20:34:11,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-05-21 20:34:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:11,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:11,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:11,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-21 20:34:11,643 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2073336534, now seen corresponding path program 97 times [2021-05-21 20:34:11,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:11,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533331216] [2021-05-21 20:34:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:11,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:11,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533331216] [2021-05-21 20:34:11,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533331216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:11,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179290605] [2021-05-21 20:34:11,741 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 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 [2021-05-21 20:34:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:11,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:11,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:11,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179290605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:11,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:11,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:11,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488246149] [2021-05-21 20:34:11,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:11,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:11,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:11,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:11,963 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:12,201 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-05-21 20:34:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:34:12,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:12,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:12,202 INFO L225 Difference]: With dead ends: 152 [2021-05-21 20:34:12,202 INFO L226 Difference]: Without dead ends: 145 [2021-05-21 20:34:12,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-21 20:34:12,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-05-21 20:34:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-05-21 20:34:12,203 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-05-21 20:34:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:12,203 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-05-21 20:34:12,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-05-21 20:34:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:12,203 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:12,204 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:12,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-21 20:34:12,405 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:12,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:12,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1613968814, now seen corresponding path program 98 times [2021-05-21 20:34:12,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:12,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497913535] [2021-05-21 20:34:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:12,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497913535] [2021-05-21 20:34:12,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497913535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580632974] [2021-05-21 20:34:12,487 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 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 [2021-05-21 20:34:12,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:12,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:12,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:12,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:12,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580632974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:12,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:12,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:12,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094585515] [2021-05-21 20:34:12,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:12,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:12,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:12,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:12,679 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:13,023 INFO L93 Difference]: Finished difference Result 186 states and 349 transitions. [2021-05-21 20:34:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:34:13,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:13,024 INFO L225 Difference]: With dead ends: 186 [2021-05-21 20:34:13,024 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:34:13,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:34:13,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 105. [2021-05-21 20:34:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-05-21 20:34:13,026 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-05-21 20:34:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:13,026 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-05-21 20:34:13,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-05-21 20:34:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:13,026 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:13,026 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:13,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:13,241 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1757683798, now seen corresponding path program 99 times [2021-05-21 20:34:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:13,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725409969] [2021-05-21 20:34:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:13,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:13,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725409969] [2021-05-21 20:34:13,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725409969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:13,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772147954] [2021-05-21 20:34:13,324 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 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 [2021-05-21 20:34:13,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:34:13,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:13,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:13,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:13,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772147954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:13,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:13,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:13,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335655948] [2021-05-21 20:34:13,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:13,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:13,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:13,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:13,496 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:14,317 INFO L93 Difference]: Finished difference Result 286 states and 540 transitions. [2021-05-21 20:34:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 20:34:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:14,317 INFO L225 Difference]: With dead ends: 286 [2021-05-21 20:34:14,318 INFO L226 Difference]: Without dead ends: 279 [2021-05-21 20:34:14,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:34:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-21 20:34:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2021-05-21 20:34:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-05-21 20:34:14,320 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-05-21 20:34:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:14,320 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-05-21 20:34:14,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-05-21 20:34:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:14,320 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:14,320 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:14,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-21 20:34:14,535 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:14,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1773144594, now seen corresponding path program 100 times [2021-05-21 20:34:14,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:14,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689017156] [2021-05-21 20:34:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:14,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:14,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689017156] [2021-05-21 20:34:14,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689017156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:14,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983777772] [2021-05-21 20:34:14,625 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 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 [2021-05-21 20:34:14,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:14,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:14,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:14,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:14,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983777772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:14,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:14,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:14,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150549655] [2021-05-21 20:34:14,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:14,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:14,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:14,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:14,847 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:15,771 INFO L93 Difference]: Finished difference Result 295 states and 558 transitions. [2021-05-21 20:34:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 20:34:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:15,772 INFO L225 Difference]: With dead ends: 295 [2021-05-21 20:34:15,772 INFO L226 Difference]: Without dead ends: 288 [2021-05-21 20:34:15,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 743.4ms TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:34:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-21 20:34:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 108. [2021-05-21 20:34:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-05-21 20:34:15,774 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-05-21 20:34:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:15,774 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-05-21 20:34:15,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-05-21 20:34:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:15,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:15,775 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:15,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:15,975 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:15,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1950367896, now seen corresponding path program 101 times [2021-05-21 20:34:15,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:15,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955957008] [2021-05-21 20:34:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:16,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:16,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955957008] [2021-05-21 20:34:16,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955957008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:16,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851616522] [2021-05-21 20:34:16,053 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 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 [2021-05-21 20:34:16,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:34:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:16,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:16,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:16,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851616522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:16,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:16,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:16,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402213963] [2021-05-21 20:34:16,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:16,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:16,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:16,248 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:16,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:16,991 INFO L93 Difference]: Finished difference Result 223 states and 419 transitions. [2021-05-21 20:34:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:34:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:16,992 INFO L225 Difference]: With dead ends: 223 [2021-05-21 20:34:16,992 INFO L226 Difference]: Without dead ends: 216 [2021-05-21 20:34:16,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 650.8ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:34:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-21 20:34:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 108. [2021-05-21 20:34:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-05-21 20:34:16,994 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-05-21 20:34:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:16,994 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-05-21 20:34:16,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-05-21 20:34:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:16,994 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:16,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:17,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-05-21 20:34:17,218 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash -512952362, now seen corresponding path program 102 times [2021-05-21 20:34:17,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:17,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814889908] [2021-05-21 20:34:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:17,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:17,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814889908] [2021-05-21 20:34:17,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814889908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:17,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529897309] [2021-05-21 20:34:17,290 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 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 [2021-05-21 20:34:17,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:34:17,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:17,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:17,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529897309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:17,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:17,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:17,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796163954] [2021-05-21 20:34:17,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:17,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:17,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:17,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:17,556 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:17,756 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-05-21 20:34:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:17,756 INFO L225 Difference]: With dead ends: 146 [2021-05-21 20:34:17,756 INFO L226 Difference]: Without dead ends: 139 [2021-05-21 20:34:17,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-21 20:34:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2021-05-21 20:34:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-05-21 20:34:17,758 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-05-21 20:34:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:17,758 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-05-21 20:34:17,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-05-21 20:34:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:17,758 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:17,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:17,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:17,963 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash -895672750, now seen corresponding path program 103 times [2021-05-21 20:34:17,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:17,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688165802] [2021-05-21 20:34:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:18,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:18,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688165802] [2021-05-21 20:34:18,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688165802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:18,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920295927] [2021-05-21 20:34:18,070 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 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 [2021-05-21 20:34:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:18,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:18,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920295927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:18,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:18,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:18,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018507631] [2021-05-21 20:34:18,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:18,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:18,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:18,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:18,323 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:18,570 INFO L93 Difference]: Finished difference Result 151 states and 298 transitions. [2021-05-21 20:34:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:34:18,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:18,570 INFO L225 Difference]: With dead ends: 151 [2021-05-21 20:34:18,570 INFO L226 Difference]: Without dead ends: 144 [2021-05-21 20:34:18,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-21 20:34:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-05-21 20:34:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-05-21 20:34:18,572 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-05-21 20:34:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:18,572 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-05-21 20:34:18,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-05-21 20:34:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:18,572 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:18,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:18,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 20:34:18,773 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1183621078, now seen corresponding path program 104 times [2021-05-21 20:34:18,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:18,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992184400] [2021-05-21 20:34:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:18,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:18,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992184400] [2021-05-21 20:34:18,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992184400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:18,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176143501] [2021-05-21 20:34:18,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:34:18,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:18,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:19,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176143501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:19,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:19,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:19,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906043958] [2021-05-21 20:34:19,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:19,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:19,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:19,090 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:19,393 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-05-21 20:34:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:34:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:19,394 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:34:19,394 INFO L226 Difference]: Without dead ends: 169 [2021-05-21 20:34:19,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:34:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-21 20:34:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2021-05-21 20:34:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 111 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 235 transitions. [2021-05-21 20:34:19,395 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 235 transitions. Word has length 19 [2021-05-21 20:34:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:19,395 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 235 transitions. [2021-05-21 20:34:19,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 235 transitions. [2021-05-21 20:34:19,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:19,396 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:19,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:19,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 20:34:19,596 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1199081874, now seen corresponding path program 105 times [2021-05-21 20:34:19,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:19,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617764254] [2021-05-21 20:34:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:19,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:19,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617764254] [2021-05-21 20:34:19,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617764254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:19,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493578786] [2021-05-21 20:34:19,678 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 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 [2021-05-21 20:34:19,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:34:19,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:19,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:19,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:19,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493578786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:19,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:19,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:19,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321295191] [2021-05-21 20:34:19,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:19,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:19,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:19,897 INFO L87 Difference]: Start difference. First operand 112 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:20,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:20,223 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-05-21 20:34:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:34:20,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:20,223 INFO L225 Difference]: With dead ends: 163 [2021-05-21 20:34:20,223 INFO L226 Difference]: Without dead ends: 156 [2021-05-21 20:34:20,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:34:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-21 20:34:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 110. [2021-05-21 20:34:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-05-21 20:34:20,225 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-05-21 20:34:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:20,225 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-05-21 20:34:20,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-05-21 20:34:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:20,225 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:20,225 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:20,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 20:34:20,440 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:20,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1806743822, now seen corresponding path program 106 times [2021-05-21 20:34:20,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:20,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218457319] [2021-05-21 20:34:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:20,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:20,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218457319] [2021-05-21 20:34:20,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218457319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:20,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169609111] [2021-05-21 20:34:20,517 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:20,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:20,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:20,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:20,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169609111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:20,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:20,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:20,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004272108] [2021-05-21 20:34:20,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:20,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:20,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:20,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:20,696 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:21,340 INFO L93 Difference]: Finished difference Result 236 states and 440 transitions. [2021-05-21 20:34:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:34:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:21,341 INFO L225 Difference]: With dead ends: 236 [2021-05-21 20:34:21,341 INFO L226 Difference]: Without dead ends: 176 [2021-05-21 20:34:21,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:34:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-21 20:34:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 109. [2021-05-21 20:34:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-05-21 20:34:21,342 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-05-21 20:34:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:21,342 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-05-21 20:34:21,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-05-21 20:34:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:21,342 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:21,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:21,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:21,543 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:21,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:21,543 INFO L82 PathProgramCache]: Analyzing trace with hash 117019782, now seen corresponding path program 107 times [2021-05-21 20:34:21,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:21,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480798266] [2021-05-21 20:34:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:21,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:21,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480798266] [2021-05-21 20:34:21,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480798266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:21,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745118343] [2021-05-21 20:34:21,621 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 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 [2021-05-21 20:34:21,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:34:21,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:21,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:21,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745118343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:21,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:21,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:21,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87302131] [2021-05-21 20:34:21,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:21,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:21,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:21,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:21,831 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:21,984 INFO L93 Difference]: Finished difference Result 126 states and 248 transitions. [2021-05-21 20:34:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:34:21,984 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:21,985 INFO L225 Difference]: With dead ends: 126 [2021-05-21 20:34:21,985 INFO L226 Difference]: Without dead ends: 119 [2021-05-21 20:34:21,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-21 20:34:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-05-21 20:34:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-05-21 20:34:21,986 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-05-21 20:34:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:21,986 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-05-21 20:34:21,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-05-21 20:34:21,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:21,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:21,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:22,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-21 20:34:22,187 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:22,187 INFO L82 PathProgramCache]: Analyzing trace with hash -2098653686, now seen corresponding path program 108 times [2021-05-21 20:34:22,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:22,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493557337] [2021-05-21 20:34:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:22,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:22,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493557337] [2021-05-21 20:34:22,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493557337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:22,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479277658] [2021-05-21 20:34:22,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:34:22,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:22,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:22,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:22,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479277658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:22,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:22,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:22,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39039147] [2021-05-21 20:34:22,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:22,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:22,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:22,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:22,485 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:22,727 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-05-21 20:34:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:34:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:22,727 INFO L225 Difference]: With dead ends: 150 [2021-05-21 20:34:22,727 INFO L226 Difference]: Without dead ends: 143 [2021-05-21 20:34:22,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:34:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-21 20:34:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2021-05-21 20:34:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-05-21 20:34:22,729 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-05-21 20:34:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:22,729 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-05-21 20:34:22,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:22,729 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-05-21 20:34:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:22,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:22,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:22,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:22,930 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:22,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:22,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2083192890, now seen corresponding path program 109 times [2021-05-21 20:34:22,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:22,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595762269] [2021-05-21 20:34:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:23,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:23,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595762269] [2021-05-21 20:34:23,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595762269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:23,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349658411] [2021-05-21 20:34:23,009 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 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 [2021-05-21 20:34:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:23,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:23,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349658411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:23,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:23,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:23,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603353574] [2021-05-21 20:34:23,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:23,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:23,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:23,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:23,218 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:23,473 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-05-21 20:34:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:34:23,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:23,473 INFO L225 Difference]: With dead ends: 137 [2021-05-21 20:34:23,473 INFO L226 Difference]: Without dead ends: 130 [2021-05-21 20:34:23,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:34:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-21 20:34:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2021-05-21 20:34:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-05-21 20:34:23,475 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-05-21 20:34:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:23,475 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-05-21 20:34:23,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-05-21 20:34:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:23,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:23,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:23,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:23,675 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash 47517074, now seen corresponding path program 110 times [2021-05-21 20:34:23,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:23,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185969218] [2021-05-21 20:34:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:23,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:23,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185969218] [2021-05-21 20:34:23,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185969218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:23,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450538476] [2021-05-21 20:34:23,767 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 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 [2021-05-21 20:34:23,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:23,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:23,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:23,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:23,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450538476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:23,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:23,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:23,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073468296] [2021-05-21 20:34:23,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:23,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:23,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:23,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:23,977 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:24,172 INFO L93 Difference]: Finished difference Result 145 states and 283 transitions. [2021-05-21 20:34:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:24,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:24,173 INFO L225 Difference]: With dead ends: 145 [2021-05-21 20:34:24,173 INFO L226 Difference]: Without dead ends: 138 [2021-05-21 20:34:24,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-21 20:34:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-05-21 20:34:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-05-21 20:34:24,189 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-05-21 20:34:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:24,189 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-05-21 20:34:24,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-05-21 20:34:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:24,190 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:24,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:24,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-21 20:34:24,398 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:24,399 INFO L82 PathProgramCache]: Analyzing trace with hash 62977870, now seen corresponding path program 111 times [2021-05-21 20:34:24,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:24,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148816888] [2021-05-21 20:34:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:24,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:24,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148816888] [2021-05-21 20:34:24,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148816888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:24,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223943051] [2021-05-21 20:34:24,479 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 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 [2021-05-21 20:34:24,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:34:24,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:24,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:24,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:24,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223943051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:24,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:24,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:24,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479140188] [2021-05-21 20:34:24,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:24,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:24,691 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:24,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:24,866 INFO L93 Difference]: Finished difference Result 151 states and 294 transitions. [2021-05-21 20:34:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:24,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:24,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:24,867 INFO L225 Difference]: With dead ends: 151 [2021-05-21 20:34:24,867 INFO L226 Difference]: Without dead ends: 144 [2021-05-21 20:34:24,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-21 20:34:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-05-21 20:34:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-05-21 20:34:24,868 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-05-21 20:34:24,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:24,869 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-05-21 20:34:24,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-05-21 20:34:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:24,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:24,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:25,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:25,081 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:25,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:25,081 INFO L82 PathProgramCache]: Analyzing trace with hash 634432676, now seen corresponding path program 112 times [2021-05-21 20:34:25,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:25,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048731177] [2021-05-21 20:34:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:25,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048731177] [2021-05-21 20:34:25,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048731177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780214052] [2021-05-21 20:34:25,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:34:25,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:25,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:25,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:25,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:25,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780214052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:25,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:25,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:25,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577170991] [2021-05-21 20:34:25,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:25,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:25,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:25,400 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:25,539 INFO L93 Difference]: Finished difference Result 128 states and 253 transitions. [2021-05-21 20:34:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:25,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:25,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:25,539 INFO L225 Difference]: With dead ends: 128 [2021-05-21 20:34:25,539 INFO L226 Difference]: Without dead ends: 121 [2021-05-21 20:34:25,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:25,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-21 20:34:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-05-21 20:34:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-05-21 20:34:25,541 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-05-21 20:34:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:25,541 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-05-21 20:34:25,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-05-21 20:34:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:25,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:25,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:25,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:25,753 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:25,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1180641562, now seen corresponding path program 113 times [2021-05-21 20:34:25,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:25,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131919667] [2021-05-21 20:34:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:25,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:25,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131919667] [2021-05-21 20:34:25,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131919667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:25,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967968280] [2021-05-21 20:34:25,829 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 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 [2021-05-21 20:34:25,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:34:25,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:25,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:25,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:26,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967968280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:26,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:26,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:26,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485516597] [2021-05-21 20:34:26,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:26,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:26,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:26,055 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:26,277 INFO L93 Difference]: Finished difference Result 138 states and 271 transitions. [2021-05-21 20:34:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:26,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:26,278 INFO L225 Difference]: With dead ends: 138 [2021-05-21 20:34:26,278 INFO L226 Difference]: Without dead ends: 131 [2021-05-21 20:34:26,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-21 20:34:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-05-21 20:34:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-05-21 20:34:26,279 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-05-21 20:34:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:26,279 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-05-21 20:34:26,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-05-21 20:34:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:26,280 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:26,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:26,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:26,480 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:26,480 INFO L82 PathProgramCache]: Analyzing trace with hash 797921174, now seen corresponding path program 114 times [2021-05-21 20:34:26,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:26,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876913308] [2021-05-21 20:34:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:26,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:26,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876913308] [2021-05-21 20:34:26,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876913308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:26,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521069356] [2021-05-21 20:34:26,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:26,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:34:26,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:26,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:26,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:26,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521069356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:26,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:26,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:26,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756831552] [2021-05-21 20:34:26,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:26,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:26,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:26,773 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:26,966 INFO L93 Difference]: Finished difference Result 142 states and 279 transitions. [2021-05-21 20:34:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:26,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:26,966 INFO L225 Difference]: With dead ends: 142 [2021-05-21 20:34:26,966 INFO L226 Difference]: Without dead ends: 135 [2021-05-21 20:34:26,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-21 20:34:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-05-21 20:34:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-05-21 20:34:26,968 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-05-21 20:34:26,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:26,968 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-05-21 20:34:26,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-05-21 20:34:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:26,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:26,968 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:27,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:27,169 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1417752294, now seen corresponding path program 115 times [2021-05-21 20:34:27,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:27,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584913040] [2021-05-21 20:34:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:27,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:27,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584913040] [2021-05-21 20:34:27,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584913040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:27,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955517358] [2021-05-21 20:34:27,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:27,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:27,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955517358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:27,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:27,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:27,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095614190] [2021-05-21 20:34:27,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:27,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:27,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:27,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:27,556 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:27,804 INFO L93 Difference]: Finished difference Result 164 states and 319 transitions. [2021-05-21 20:34:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:34:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:27,805 INFO L225 Difference]: With dead ends: 164 [2021-05-21 20:34:27,805 INFO L226 Difference]: Without dead ends: 157 [2021-05-21 20:34:27,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-21 20:34:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-05-21 20:34:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-05-21 20:34:27,806 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-05-21 20:34:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:27,806 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-05-21 20:34:27,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-05-21 20:34:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:27,807 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:27,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:28,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-21 20:34:28,007 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1402291498, now seen corresponding path program 116 times [2021-05-21 20:34:28,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:28,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4496440] [2021-05-21 20:34:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:28,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:28,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4496440] [2021-05-21 20:34:28,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4496440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:28,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286559513] [2021-05-21 20:34:28,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:28,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:28,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:28,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:28,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:28,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286559513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:28,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:28,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:28,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458249810] [2021-05-21 20:34:28,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:28,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:28,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:28,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:28,375 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:28,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:28,660 INFO L93 Difference]: Finished difference Result 151 states and 301 transitions. [2021-05-21 20:34:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:34:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:28,661 INFO L225 Difference]: With dead ends: 151 [2021-05-21 20:34:28,661 INFO L226 Difference]: Without dead ends: 144 [2021-05-21 20:34:28,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-21 20:34:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2021-05-21 20:34:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-05-21 20:34:28,662 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-05-21 20:34:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:28,663 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-05-21 20:34:28,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-05-21 20:34:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:28,663 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:28,663 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:28,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-21 20:34:28,863 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1810613706, now seen corresponding path program 117 times [2021-05-21 20:34:28,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:28,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630082663] [2021-05-21 20:34:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:28,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:28,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630082663] [2021-05-21 20:34:28,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630082663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:28,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22463780] [2021-05-21 20:34:28,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:28,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:34:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:29,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22463780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:29,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:29,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:29,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848348145] [2021-05-21 20:34:29,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:29,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:29,169 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:29,345 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-05-21 20:34:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:29,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:29,346 INFO L225 Difference]: With dead ends: 130 [2021-05-21 20:34:29,346 INFO L226 Difference]: Without dead ends: 123 [2021-05-21 20:34:29,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-21 20:34:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-05-21 20:34:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-05-21 20:34:29,347 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-05-21 20:34:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:29,347 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-05-21 20:34:29,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-05-21 20:34:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:29,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:29,348 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:29,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 20:34:29,548 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:29,548 INFO L82 PathProgramCache]: Analyzing trace with hash -405059762, now seen corresponding path program 118 times [2021-05-21 20:34:29,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:29,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945400464] [2021-05-21 20:34:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:29,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:29,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945400464] [2021-05-21 20:34:29,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945400464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:29,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670609210] [2021-05-21 20:34:29,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:29,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:29,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:29,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:29,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:29,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670609210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:29,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:29,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:29,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992740570] [2021-05-21 20:34:29,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:29,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:29,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:29,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:29,838 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:30,062 INFO L93 Difference]: Finished difference Result 153 states and 297 transitions. [2021-05-21 20:34:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:30,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:30,063 INFO L225 Difference]: With dead ends: 153 [2021-05-21 20:34:30,063 INFO L226 Difference]: Without dead ends: 146 [2021-05-21 20:34:30,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-21 20:34:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-05-21 20:34:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-05-21 20:34:30,064 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-05-21 20:34:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:30,064 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-05-21 20:34:30,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-05-21 20:34:30,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:30,064 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:30,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:30,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:30,280 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:30,281 INFO L82 PathProgramCache]: Analyzing trace with hash -389598966, now seen corresponding path program 119 times [2021-05-21 20:34:30,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:30,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314632726] [2021-05-21 20:34:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:30,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:30,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314632726] [2021-05-21 20:34:30,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314632726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:30,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597544822] [2021-05-21 20:34:30,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:30,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:34:30,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:30,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:30,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597544822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:30,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:30,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:30,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118767199] [2021-05-21 20:34:30,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:30,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:30,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:30,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:30,581 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:30,814 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-05-21 20:34:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:30,814 INFO L225 Difference]: With dead ends: 140 [2021-05-21 20:34:30,815 INFO L226 Difference]: Without dead ends: 133 [2021-05-21 20:34:30,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-21 20:34:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-05-21 20:34:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.036363636363636) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 224 transitions. [2021-05-21 20:34:30,816 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 224 transitions. Word has length 19 [2021-05-21 20:34:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:30,816 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 224 transitions. [2021-05-21 20:34:30,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 224 transitions. [2021-05-21 20:34:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:30,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:30,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:31,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-21 20:34:31,021 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:31,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1741110998, now seen corresponding path program 120 times [2021-05-21 20:34:31,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:31,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887214189] [2021-05-21 20:34:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:31,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:31,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887214189] [2021-05-21 20:34:31,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887214189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:31,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040820968] [2021-05-21 20:34:31,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:31,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:31,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:31,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:31,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:31,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040820968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:31,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:31,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:31,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170596434] [2021-05-21 20:34:31,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:31,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:31,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:31,319 INFO L87 Difference]: Start difference. First operand 111 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:31,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:31,541 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-05-21 20:34:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:31,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:31,541 INFO L225 Difference]: With dead ends: 150 [2021-05-21 20:34:31,541 INFO L226 Difference]: Without dead ends: 143 [2021-05-21 20:34:31,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-21 20:34:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-05-21 20:34:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-05-21 20:34:31,543 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-05-21 20:34:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:31,543 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-05-21 20:34:31,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-05-21 20:34:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:31,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:31,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:31,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-21 20:34:31,757 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1756571794, now seen corresponding path program 121 times [2021-05-21 20:34:31,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:31,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856485133] [2021-05-21 20:34:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:31,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:31,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856485133] [2021-05-21 20:34:31,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856485133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:31,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006180250] [2021-05-21 20:34:31,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:34:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:31,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:31,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:32,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006180250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:32,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:32,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:32,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048951926] [2021-05-21 20:34:32,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:32,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:32,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:32,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:32,045 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:32,291 INFO L93 Difference]: Finished difference Result 156 states and 304 transitions. [2021-05-21 20:34:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:32,292 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:32,292 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:34:32,292 INFO L226 Difference]: Without dead ends: 149 [2021-05-21 20:34:32,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-21 20:34:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2021-05-21 20:34:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-05-21 20:34:32,293 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-05-21 20:34:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:32,294 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-05-21 20:34:32,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-05-21 20:34:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:32,294 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:32,294 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:32,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-21 20:34:32,494 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1966940696, now seen corresponding path program 122 times [2021-05-21 20:34:32,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:32,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022743519] [2021-05-21 20:34:32,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:32,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:32,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022743519] [2021-05-21 20:34:32,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022743519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:32,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597552960] [2021-05-21 20:34:32,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:34:32,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:32,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:32,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:32,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597552960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:32,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:32,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:32,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691582013] [2021-05-21 20:34:32,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:32,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:32,784 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:32,992 INFO L93 Difference]: Finished difference Result 133 states and 263 transitions. [2021-05-21 20:34:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:32,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:32,992 INFO L225 Difference]: With dead ends: 133 [2021-05-21 20:34:32,992 INFO L226 Difference]: Without dead ends: 126 [2021-05-21 20:34:32,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-21 20:34:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-05-21 20:34:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-05-21 20:34:32,994 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-05-21 20:34:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:32,994 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-05-21 20:34:32,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-05-21 20:34:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:32,994 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:32,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:33,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:33,195 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1598555310, now seen corresponding path program 123 times [2021-05-21 20:34:33,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:33,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272935582] [2021-05-21 20:34:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:33,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272935582] [2021-05-21 20:34:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272935582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250250276] [2021-05-21 20:34:33,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:33,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:34:33,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:33,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:33,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:33,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250250276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:33,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:33,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:33,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223635896] [2021-05-21 20:34:33,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:33,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:33,518 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:33,671 INFO L93 Difference]: Finished difference Result 128 states and 252 transitions. [2021-05-21 20:34:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:33,671 INFO L225 Difference]: With dead ends: 128 [2021-05-21 20:34:33,671 INFO L226 Difference]: Without dead ends: 121 [2021-05-21 20:34:33,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:33,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-21 20:34:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-05-21 20:34:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-05-21 20:34:33,673 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-05-21 20:34:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:33,673 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-05-21 20:34:33,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-05-21 20:34:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:33,673 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:33,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:33,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:33,873 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:33,874 INFO L82 PathProgramCache]: Analyzing trace with hash 480738518, now seen corresponding path program 124 times [2021-05-21 20:34:33,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:33,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205370015] [2021-05-21 20:34:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:33,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:33,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205370015] [2021-05-21 20:34:33,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205370015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:33,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26682926] [2021-05-21 20:34:33,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:33,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:33,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:33,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:33,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:34,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26682926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:34,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:34,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:34,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766805762] [2021-05-21 20:34:34,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:34,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:34,164 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:34,401 INFO L93 Difference]: Finished difference Result 151 states and 293 transitions. [2021-05-21 20:34:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:34,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:34,402 INFO L225 Difference]: With dead ends: 151 [2021-05-21 20:34:34,402 INFO L226 Difference]: Without dead ends: 144 [2021-05-21 20:34:34,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-21 20:34:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-05-21 20:34:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-05-21 20:34:34,403 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-05-21 20:34:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:34,404 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-05-21 20:34:34,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-05-21 20:34:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:34,404 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:34,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:34,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-05-21 20:34:34,619 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash 496199314, now seen corresponding path program 125 times [2021-05-21 20:34:34,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:34,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749258496] [2021-05-21 20:34:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:34,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:34,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749258496] [2021-05-21 20:34:34,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749258496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:34,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4674709] [2021-05-21 20:34:34,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:34,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:34:34,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:34,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:34,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:34,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4674709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:34,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:34,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:34,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930274584] [2021-05-21 20:34:34,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:34,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:34,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:34,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:34,896 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:35,142 INFO L93 Difference]: Finished difference Result 138 states and 275 transitions. [2021-05-21 20:34:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:35,143 INFO L225 Difference]: With dead ends: 138 [2021-05-21 20:34:35,143 INFO L226 Difference]: Without dead ends: 131 [2021-05-21 20:34:35,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-21 20:34:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-05-21 20:34:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-05-21 20:34:35,144 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-05-21 20:34:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:35,144 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-05-21 20:34:35,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-05-21 20:34:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:35,144 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:35,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:35,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-21 20:34:35,361 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:35,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1668058018, now seen corresponding path program 126 times [2021-05-21 20:34:35,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:35,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524911531] [2021-05-21 20:34:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:35,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:35,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524911531] [2021-05-21 20:34:35,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524911531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:35,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315732168] [2021-05-21 20:34:35,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:34:35,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:35,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:35,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:35,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:35,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315732168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:35,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:35,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:35,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931670381] [2021-05-21 20:34:35,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:35,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:35,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:35,738 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:35,963 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-05-21 20:34:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:35,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:35,963 INFO L225 Difference]: With dead ends: 148 [2021-05-21 20:34:35,964 INFO L226 Difference]: Without dead ends: 141 [2021-05-21 20:34:35,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-21 20:34:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-05-21 20:34:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-05-21 20:34:35,965 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-05-21 20:34:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:35,965 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-05-21 20:34:35,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-05-21 20:34:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:35,965 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:35,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:36,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 20:34:36,166 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:36,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1652597222, now seen corresponding path program 127 times [2021-05-21 20:34:36,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:36,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262230557] [2021-05-21 20:34:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:36,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:36,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262230557] [2021-05-21 20:34:36,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262230557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:36,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927303303] [2021-05-21 20:34:36,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:36,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:36,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927303303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:36,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:36,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:36,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502952181] [2021-05-21 20:34:36,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:36,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:36,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:36,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:36,454 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:36,679 INFO L93 Difference]: Finished difference Result 154 states and 300 transitions. [2021-05-21 20:34:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:36,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:36,680 INFO L225 Difference]: With dead ends: 154 [2021-05-21 20:34:36,680 INFO L226 Difference]: Without dead ends: 147 [2021-05-21 20:34:36,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-21 20:34:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2021-05-21 20:34:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-05-21 20:34:36,681 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-05-21 20:34:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:36,681 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-05-21 20:34:36,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-05-21 20:34:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:36,682 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:36,682 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:36,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-21 20:34:36,882 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:36,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1081142416, now seen corresponding path program 128 times [2021-05-21 20:34:36,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:36,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902273512] [2021-05-21 20:34:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:36,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:36,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902273512] [2021-05-21 20:34:36,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902273512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:36,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614553090] [2021-05-21 20:34:36,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:36,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:36,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:36,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:36,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:37,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614553090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:37,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:37,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:37,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700941044] [2021-05-21 20:34:37,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:37,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:37,171 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:37,365 INFO L93 Difference]: Finished difference Result 131 states and 259 transitions. [2021-05-21 20:34:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:37,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:37,366 INFO L225 Difference]: With dead ends: 131 [2021-05-21 20:34:37,366 INFO L226 Difference]: Without dead ends: 124 [2021-05-21 20:34:37,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-21 20:34:37,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-05-21 20:34:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-05-21 20:34:37,367 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 19 [2021-05-21 20:34:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:37,367 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-05-21 20:34:37,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-05-21 20:34:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:37,368 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:37,368 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:37,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-21 20:34:37,568 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1532817690, now seen corresponding path program 129 times [2021-05-21 20:34:37,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:37,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946531075] [2021-05-21 20:34:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:37,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:37,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946531075] [2021-05-21 20:34:37,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946531075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:37,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362146961] [2021-05-21 20:34:37,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:37,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:34:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:37,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:37,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362146961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:37,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:37,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:37,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333174324] [2021-05-21 20:34:37,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:37,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:37,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:37,873 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:38,091 INFO L93 Difference]: Finished difference Result 165 states and 320 transitions. [2021-05-21 20:34:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:34:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:38,092 INFO L225 Difference]: With dead ends: 165 [2021-05-21 20:34:38,092 INFO L226 Difference]: Without dead ends: 158 [2021-05-21 20:34:38,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-21 20:34:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-05-21 20:34:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-05-21 20:34:38,094 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-05-21 20:34:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:38,094 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-05-21 20:34:38,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-05-21 20:34:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:38,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:38,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:38,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-05-21 20:34:38,294 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1548278486, now seen corresponding path program 130 times [2021-05-21 20:34:38,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:38,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878667118] [2021-05-21 20:34:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:38,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:38,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878667118] [2021-05-21 20:34:38,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878667118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:38,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284748891] [2021-05-21 20:34:38,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:38,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:38,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:38,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284748891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:38,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:38,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:38,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359237053] [2021-05-21 20:34:38,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:38,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:38,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:38,576 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:38,881 INFO L93 Difference]: Finished difference Result 171 states and 331 transitions. [2021-05-21 20:34:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:34:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:38,881 INFO L225 Difference]: With dead ends: 171 [2021-05-21 20:34:38,882 INFO L226 Difference]: Without dead ends: 164 [2021-05-21 20:34:38,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:38,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-21 20:34:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2021-05-21 20:34:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-05-21 20:34:38,883 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-05-21 20:34:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:38,883 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-05-21 20:34:38,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-05-21 20:34:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:38,883 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:38,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:39,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-21 20:34:39,099 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:39,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2119733292, now seen corresponding path program 131 times [2021-05-21 20:34:39,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:39,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216295418] [2021-05-21 20:34:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:39,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:39,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216295418] [2021-05-21 20:34:39,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216295418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:39,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201282598] [2021-05-21 20:34:39,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:34:39,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:34:39,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:39,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201282598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:39,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:39,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:39,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726662664] [2021-05-21 20:34:39,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:39,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:39,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:39,379 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:39,580 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-05-21 20:34:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:39,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:39,581 INFO L225 Difference]: With dead ends: 150 [2021-05-21 20:34:39,581 INFO L226 Difference]: Without dead ends: 143 [2021-05-21 20:34:39,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-21 20:34:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-05-21 20:34:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-05-21 20:34:39,582 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-05-21 20:34:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:39,582 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-05-21 20:34:39,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-05-21 20:34:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:39,583 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:39,583 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:39,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-21 20:34:39,783 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash -737818470, now seen corresponding path program 132 times [2021-05-21 20:34:39,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:39,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193711683] [2021-05-21 20:34:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:39,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:39,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193711683] [2021-05-21 20:34:39,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193711683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:39,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475940710] [2021-05-21 20:34:39,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:39,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:34:39,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:39,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:39,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:40,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475940710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:40,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:40,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-05-21 20:34:40,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871889653] [2021-05-21 20:34:40,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 20:34:40,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:40,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 20:34:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:34:40,055 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-05-21 20:34:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:40,623 INFO L93 Difference]: Finished difference Result 197 states and 356 transitions. [2021-05-21 20:34:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:34:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 [2021-05-21 20:34:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:40,624 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:34:40,624 INFO L226 Difference]: Without dead ends: 156 [2021-05-21 20:34:40,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 590.9ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:34:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-21 20:34:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2021-05-21 20:34:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 115 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 236 transitions. [2021-05-21 20:34:40,626 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 236 transitions. Word has length 19 [2021-05-21 20:34:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:40,626 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 236 transitions. [2021-05-21 20:34:40,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-05-21 20:34:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 236 transitions. [2021-05-21 20:34:40,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:40,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:40,626 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:40,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:40,826 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:40,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1120538858, now seen corresponding path program 133 times [2021-05-21 20:34:40,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:40,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887411523] [2021-05-21 20:34:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:40,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:40,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887411523] [2021-05-21 20:34:40,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887411523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:40,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254741869] [2021-05-21 20:34:40,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:40,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:41,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254741869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:41,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:41,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-05-21 20:34:41,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819306722] [2021-05-21 20:34:41,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 20:34:41,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 20:34:41,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:34:41,099 INFO L87 Difference]: Start difference. First operand 116 states and 236 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-05-21 20:34:41,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:41,466 INFO L93 Difference]: Finished difference Result 160 states and 304 transitions. [2021-05-21 20:34:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:34:41,466 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 [2021-05-21 20:34:41,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:41,466 INFO L225 Difference]: With dead ends: 160 [2021-05-21 20:34:41,466 INFO L226 Difference]: Without dead ends: 153 [2021-05-21 20:34:41,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:34:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-21 20:34:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-05-21 20:34:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-05-21 20:34:41,468 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-05-21 20:34:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:41,468 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-05-21 20:34:41,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-05-21 20:34:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-05-21 20:34:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:41,468 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:41,468 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:41,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:41,669 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:41,669 INFO L82 PathProgramCache]: Analyzing trace with hash 958754970, now seen corresponding path program 134 times [2021-05-21 20:34:41,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:41,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582341220] [2021-05-21 20:34:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:41,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:41,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582341220] [2021-05-21 20:34:41,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582341220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:41,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347165709] [2021-05-21 20:34:41,747 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 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 [2021-05-21 20:34:41,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:41,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:41,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:41,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:41,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347165709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:41,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:41,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-05-21 20:34:41,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434646509] [2021-05-21 20:34:41,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 20:34:41,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 20:34:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:34:41,975 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-05-21 20:34:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:42,692 INFO L93 Difference]: Finished difference Result 223 states and 409 transitions. [2021-05-21 20:34:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:34:42,692 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 [2021-05-21 20:34:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:42,692 INFO L225 Difference]: With dead ends: 223 [2021-05-21 20:34:42,692 INFO L226 Difference]: Without dead ends: 216 [2021-05-21 20:34:42,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 756.0ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:34:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-21 20:34:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 113. [2021-05-21 20:34:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-05-21 20:34:42,694 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-05-21 20:34:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:42,694 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-05-21 20:34:42,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-05-21 20:34:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-05-21 20:34:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:42,694 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:42,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:42,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:42,895 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:42,895 INFO L82 PathProgramCache]: Analyzing trace with hash 974215766, now seen corresponding path program 135 times [2021-05-21 20:34:42,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:42,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393965901] [2021-05-21 20:34:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:42,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:42,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393965901] [2021-05-21 20:34:42,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393965901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:42,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554092558] [2021-05-21 20:34:42,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:43,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:34:43,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:43,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:43,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:43,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554092558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:43,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:43,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-05-21 20:34:43,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920139174] [2021-05-21 20:34:43,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 20:34:43,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:43,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 20:34:43,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:34:43,224 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-05-21 20:34:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:44,010 INFO L93 Difference]: Finished difference Result 214 states and 397 transitions. [2021-05-21 20:34:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:34:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 [2021-05-21 20:34:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:44,010 INFO L225 Difference]: With dead ends: 214 [2021-05-21 20:34:44,011 INFO L226 Difference]: Without dead ends: 207 [2021-05-21 20:34:44,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 742.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:34:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-21 20:34:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 111. [2021-05-21 20:34:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-05-21 20:34:44,012 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-05-21 20:34:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:44,012 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-05-21 20:34:44,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-05-21 20:34:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-05-21 20:34:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:44,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:44,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:44,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:44,227 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:44,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1581877714, now seen corresponding path program 136 times [2021-05-21 20:34:44,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:44,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436400243] [2021-05-21 20:34:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:44,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436400243] [2021-05-21 20:34:44,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436400243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491139723] [2021-05-21 20:34:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:44,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:44,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:44,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:44,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491139723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:44,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:44,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:44,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88321992] [2021-05-21 20:34:44,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:44,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:44,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:44,519 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:44,685 INFO L93 Difference]: Finished difference Result 137 states and 269 transitions. [2021-05-21 20:34:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:34:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:44,685 INFO L225 Difference]: With dead ends: 137 [2021-05-21 20:34:44,685 INFO L226 Difference]: Without dead ends: 130 [2021-05-21 20:34:44,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-21 20:34:44,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2021-05-21 20:34:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-05-21 20:34:44,687 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-05-21 20:34:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:44,687 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-05-21 20:34:44,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:34:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-05-21 20:34:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:44,687 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:44,687 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:44,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-21 20:34:44,888 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:44,888 INFO L82 PathProgramCache]: Analyzing trace with hash 811172182, now seen corresponding path program 137 times [2021-05-21 20:34:44,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:44,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358680415] [2021-05-21 20:34:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:44,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:44,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358680415] [2021-05-21 20:34:44,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358680415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:44,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456299334] [2021-05-21 20:34:44,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:44,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:34:44,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:44,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:44,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:45,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456299334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:45,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:45,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:34:45,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692191823] [2021-05-21 20:34:45,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:34:45,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:34:45,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:34:45,141 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:34:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:45,808 INFO L93 Difference]: Finished difference Result 235 states and 445 transitions. [2021-05-21 20:34:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:34:45,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:34:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:45,809 INFO L225 Difference]: With dead ends: 235 [2021-05-21 20:34:45,809 INFO L226 Difference]: Without dead ends: 228 [2021-05-21 20:34:45,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 533.0ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:34:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-21 20:34:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 115. [2021-05-21 20:34:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-05-21 20:34:45,810 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-05-21 20:34:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:45,811 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-05-21 20:34:45,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:34:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-05-21 20:34:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:45,811 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:45,811 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:46,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-21 20:34:46,011 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:46,012 INFO L82 PathProgramCache]: Analyzing trace with hash 826632978, now seen corresponding path program 138 times [2021-05-21 20:34:46,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:46,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164209028] [2021-05-21 20:34:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:46,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:46,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164209028] [2021-05-21 20:34:46,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164209028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:46,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910720417] [2021-05-21 20:34:46,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:46,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:34:46,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:46,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:46,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:46,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910720417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:46,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:46,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:34:46,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30682242] [2021-05-21 20:34:46,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:34:46,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:46,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:34:46,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:34:46,257 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:34:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:46,884 INFO L93 Difference]: Finished difference Result 235 states and 448 transitions. [2021-05-21 20:34:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:34:46,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:34:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:46,885 INFO L225 Difference]: With dead ends: 235 [2021-05-21 20:34:46,885 INFO L226 Difference]: Without dead ends: 228 [2021-05-21 20:34:46,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:34:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-21 20:34:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 114. [2021-05-21 20:34:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-05-21 20:34:46,887 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-05-21 20:34:46,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:46,887 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-05-21 20:34:46,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:34:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-05-21 20:34:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:46,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:46,887 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:47,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 20:34:47,103 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:47,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:47,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1398087784, now seen corresponding path program 139 times [2021-05-21 20:34:47,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:47,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308002871] [2021-05-21 20:34:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:47,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:47,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308002871] [2021-05-21 20:34:47,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308002871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:47,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326353141] [2021-05-21 20:34:47,182 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 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 [2021-05-21 20:34:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:47,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:47,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326353141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:47,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:47,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:34:47,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179289672] [2021-05-21 20:34:47,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:34:47,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:47,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:34:47,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:34:47,368 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:34:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:47,942 INFO L93 Difference]: Finished difference Result 201 states and 382 transitions. [2021-05-21 20:34:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:34:47,942 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:34:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:47,943 INFO L225 Difference]: With dead ends: 201 [2021-05-21 20:34:47,943 INFO L226 Difference]: Without dead ends: 194 [2021-05-21 20:34:47,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 586.9ms TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:34:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-21 20:34:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 113. [2021-05-21 20:34:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-05-21 20:34:47,944 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-05-21 20:34:47,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:47,944 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-05-21 20:34:47,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:34:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-05-21 20:34:47,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:47,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:47,945 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:48,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-21 20:34:48,145 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:48,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1459463978, now seen corresponding path program 140 times [2021-05-21 20:34:48,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:48,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363604018] [2021-05-21 20:34:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:48,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:48,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363604018] [2021-05-21 20:34:48,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363604018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:48,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392346905] [2021-05-21 20:34:48,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:34:48,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:48,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:48,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392346905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:48,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:48,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:48,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134098107] [2021-05-21 20:34:48,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:48,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:48,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:48,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:48,476 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:48,699 INFO L93 Difference]: Finished difference Result 157 states and 306 transitions. [2021-05-21 20:34:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:48,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:48,699 INFO L225 Difference]: With dead ends: 157 [2021-05-21 20:34:48,699 INFO L226 Difference]: Without dead ends: 150 [2021-05-21 20:34:48,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:48,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-21 20:34:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 113. [2021-05-21 20:34:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-05-21 20:34:48,701 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-05-21 20:34:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:48,701 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-05-21 20:34:48,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-05-21 20:34:48,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:48,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:48,701 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:48,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-21 20:34:48,901 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:48,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:48,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1842184366, now seen corresponding path program 141 times [2021-05-21 20:34:48,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:48,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740627277] [2021-05-21 20:34:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:48,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:48,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740627277] [2021-05-21 20:34:48,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740627277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:48,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334771161] [2021-05-21 20:34:48,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:48,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:34:48,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:48,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:48,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:49,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334771161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:49,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:49,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437097434] [2021-05-21 20:34:49,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:49,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:49,185 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:49,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:49,351 INFO L93 Difference]: Finished difference Result 161 states and 314 transitions. [2021-05-21 20:34:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:49,351 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:49,352 INFO L225 Difference]: With dead ends: 161 [2021-05-21 20:34:49,352 INFO L226 Difference]: Without dead ends: 154 [2021-05-21 20:34:49,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-21 20:34:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2021-05-21 20:34:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-05-21 20:34:49,353 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-05-21 20:34:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:49,353 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-05-21 20:34:49,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-05-21 20:34:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:49,353 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:49,353 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:49,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-21 20:34:49,568 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:49,568 INFO L82 PathProgramCache]: Analyzing trace with hash 237109462, now seen corresponding path program 142 times [2021-05-21 20:34:49,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:49,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826461664] [2021-05-21 20:34:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:49,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:49,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826461664] [2021-05-21 20:34:49,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826461664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:49,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286208458] [2021-05-21 20:34:49,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:49,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:49,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:49,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:49,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286208458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:49,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:49,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:49,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274748950] [2021-05-21 20:34:49,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:49,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:49,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:49,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:49,846 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:50,156 INFO L93 Difference]: Finished difference Result 183 states and 354 transitions. [2021-05-21 20:34:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:34:50,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:50,157 INFO L225 Difference]: With dead ends: 183 [2021-05-21 20:34:50,157 INFO L226 Difference]: Without dead ends: 176 [2021-05-21 20:34:50,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 281.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-21 20:34:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 115. [2021-05-21 20:34:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-05-21 20:34:50,159 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-05-21 20:34:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:50,159 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-05-21 20:34:50,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:50,159 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-05-21 20:34:50,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:50,159 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:50,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:50,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:50,359 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:50,360 INFO L82 PathProgramCache]: Analyzing trace with hash 252570258, now seen corresponding path program 143 times [2021-05-21 20:34:50,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:50,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116546595] [2021-05-21 20:34:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:50,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:50,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116546595] [2021-05-21 20:34:50,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116546595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:50,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430754167] [2021-05-21 20:34:50,439 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 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 [2021-05-21 20:34:50,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:34:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:50,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:50,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430754167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:50,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:50,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:50,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262598473] [2021-05-21 20:34:50,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:50,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:50,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:50,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:50,644 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:50,861 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-05-21 20:34:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:34:50,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:50,862 INFO L225 Difference]: With dead ends: 170 [2021-05-21 20:34:50,862 INFO L226 Difference]: Without dead ends: 163 [2021-05-21 20:34:50,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:34:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-21 20:34:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-05-21 20:34:50,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-05-21 20:34:50,863 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-05-21 20:34:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:50,863 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-05-21 20:34:50,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-05-21 20:34:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:50,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:50,863 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:51,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:51,064 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash 860232206, now seen corresponding path program 144 times [2021-05-21 20:34:51,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:51,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876950046] [2021-05-21 20:34:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:51,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:51,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876950046] [2021-05-21 20:34:51,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876950046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:51,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975528071] [2021-05-21 20:34:51,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:51,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:51,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:34:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:51,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975528071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:51,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:51,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:34:51,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730021581] [2021-05-21 20:34:51,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:34:51,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:34:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:34:51,312 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:34:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:51,960 INFO L93 Difference]: Finished difference Result 215 states and 406 transitions. [2021-05-21 20:34:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:34:51,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:34:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:51,961 INFO L225 Difference]: With dead ends: 215 [2021-05-21 20:34:51,961 INFO L226 Difference]: Without dead ends: 138 [2021-05-21 20:34:51,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:34:51,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-21 20:34:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2021-05-21 20:34:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-05-21 20:34:51,962 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 19 [2021-05-21 20:34:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:51,962 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-05-21 20:34:51,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:34:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-05-21 20:34:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:51,963 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:51,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:52,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:52,163 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:52,163 INFO L82 PathProgramCache]: Analyzing trace with hash -829491834, now seen corresponding path program 145 times [2021-05-21 20:34:52,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:52,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957660449] [2021-05-21 20:34:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:52,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:52,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957660449] [2021-05-21 20:34:52,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957660449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:52,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910279938] [2021-05-21 20:34:52,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:52,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:52,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910279938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:52,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:52,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:52,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700698325] [2021-05-21 20:34:52,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:52,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:52,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:52,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:52,455 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:52,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:52,653 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2021-05-21 20:34:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:52,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:52,653 INFO L225 Difference]: With dead ends: 126 [2021-05-21 20:34:52,653 INFO L226 Difference]: Without dead ends: 119 [2021-05-21 20:34:52,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:52,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-21 20:34:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2021-05-21 20:34:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-05-21 20:34:52,655 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-05-21 20:34:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:52,655 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-05-21 20:34:52,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-05-21 20:34:52,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:52,655 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:52,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:52,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:52,856 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:52,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1249801994, now seen corresponding path program 146 times [2021-05-21 20:34:52,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:52,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754207926] [2021-05-21 20:34:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:52,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:52,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754207926] [2021-05-21 20:34:52,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754207926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:52,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246383267] [2021-05-21 20:34:52,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:52,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:52,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:52,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:52,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:53,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246383267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:53,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:53,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:53,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161845033] [2021-05-21 20:34:53,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:53,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:53,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:53,160 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:53,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:53,408 INFO L93 Difference]: Finished difference Result 149 states and 288 transitions. [2021-05-21 20:34:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:53,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:53,408 INFO L225 Difference]: With dead ends: 149 [2021-05-21 20:34:53,408 INFO L226 Difference]: Without dead ends: 142 [2021-05-21 20:34:53,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-21 20:34:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2021-05-21 20:34:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-05-21 20:34:53,410 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-05-21 20:34:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:53,410 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-05-21 20:34:53,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-05-21 20:34:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:53,410 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:53,410 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:53,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:53,611 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:53,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1265262790, now seen corresponding path program 147 times [2021-05-21 20:34:53,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:53,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531910112] [2021-05-21 20:34:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:53,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:53,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531910112] [2021-05-21 20:34:53,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531910112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:53,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416057990] [2021-05-21 20:34:53,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:53,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:34:53,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:53,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:53,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:53,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416057990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:53,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:53,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:53,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411174853] [2021-05-21 20:34:53,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:53,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:53,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:53,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:53,918 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:54,133 INFO L93 Difference]: Finished difference Result 136 states and 270 transitions. [2021-05-21 20:34:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:54,134 INFO L225 Difference]: With dead ends: 136 [2021-05-21 20:34:54,134 INFO L226 Difference]: Without dead ends: 129 [2021-05-21 20:34:54,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-21 20:34:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2021-05-21 20:34:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-05-21 20:34:54,135 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-05-21 20:34:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:54,135 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-05-21 20:34:54,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-05-21 20:34:54,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:54,136 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:54,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:54,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:54,336 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:54,336 INFO L82 PathProgramCache]: Analyzing trace with hash -898994542, now seen corresponding path program 148 times [2021-05-21 20:34:54,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:54,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791632709] [2021-05-21 20:34:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:54,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:54,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791632709] [2021-05-21 20:34:54,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791632709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:54,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390066250] [2021-05-21 20:34:54,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:54,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:54,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:54,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:54,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:54,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390066250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:54,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:54,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:54,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469825146] [2021-05-21 20:34:54,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:54,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:54,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:54,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:54,631 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:54,870 INFO L93 Difference]: Finished difference Result 146 states and 284 transitions. [2021-05-21 20:34:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:54,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:54,871 INFO L225 Difference]: With dead ends: 146 [2021-05-21 20:34:54,871 INFO L226 Difference]: Without dead ends: 139 [2021-05-21 20:34:54,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-21 20:34:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2021-05-21 20:34:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-05-21 20:34:54,872 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-05-21 20:34:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:54,872 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-05-21 20:34:54,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-05-21 20:34:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:54,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:54,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:55,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 20:34:55,073 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -883533746, now seen corresponding path program 149 times [2021-05-21 20:34:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:55,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223039957] [2021-05-21 20:34:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:55,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:55,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223039957] [2021-05-21 20:34:55,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223039957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:55,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349428645] [2021-05-21 20:34:55,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:55,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:34:55,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:55,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:55,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:55,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349428645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:55,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:55,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:55,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938712796] [2021-05-21 20:34:55,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:55,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:55,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:55,367 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:55,556 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-05-21 20:34:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:55,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:55,556 INFO L225 Difference]: With dead ends: 152 [2021-05-21 20:34:55,556 INFO L226 Difference]: Without dead ends: 145 [2021-05-21 20:34:55,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-21 20:34:55,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-05-21 20:34:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-05-21 20:34:55,558 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-05-21 20:34:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:55,558 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-05-21 20:34:55,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-05-21 20:34:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:55,558 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:55,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:55,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-21 20:34:55,758 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash -312078940, now seen corresponding path program 150 times [2021-05-21 20:34:55,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:55,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197597697] [2021-05-21 20:34:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:55,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197597697] [2021-05-21 20:34:55,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197597697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509759277] [2021-05-21 20:34:55,835 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 [2021-05-21 20:34:55,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:55,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:55,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:55,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:56,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509759277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:56,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:56,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:56,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518012216] [2021-05-21 20:34:56,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:56,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:56,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:56,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:56,065 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:56,207 INFO L93 Difference]: Finished difference Result 129 states and 254 transitions. [2021-05-21 20:34:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:56,208 INFO L225 Difference]: With dead ends: 129 [2021-05-21 20:34:56,208 INFO L226 Difference]: Without dead ends: 122 [2021-05-21 20:34:56,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-21 20:34:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-05-21 20:34:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-05-21 20:34:56,209 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-05-21 20:34:56,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:56,209 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-05-21 20:34:56,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-05-21 20:34:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:56,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:56,209 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:56,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-21 20:34:56,410 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:56,410 INFO L82 PathProgramCache]: Analyzing trace with hash 56306446, now seen corresponding path program 151 times [2021-05-21 20:34:56,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:56,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670187031] [2021-05-21 20:34:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:56,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:56,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670187031] [2021-05-21 20:34:56,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670187031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:56,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801232555] [2021-05-21 20:34:56,487 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 [2021-05-21 20:34:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:56,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:56,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801232555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:56,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:56,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:56,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434065961] [2021-05-21 20:34:56,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:56,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:56,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:56,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:56,693 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:56,845 INFO L93 Difference]: Finished difference Result 130 states and 255 transitions. [2021-05-21 20:34:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:56,845 INFO L225 Difference]: With dead ends: 130 [2021-05-21 20:34:56,845 INFO L226 Difference]: Without dead ends: 123 [2021-05-21 20:34:56,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-21 20:34:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2021-05-21 20:34:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-05-21 20:34:56,847 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-05-21 20:34:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:56,847 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-05-21 20:34:56,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-05-21 20:34:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:56,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:56,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:57,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:57,047 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:57,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2135600274, now seen corresponding path program 152 times [2021-05-21 20:34:57,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:57,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461989576] [2021-05-21 20:34:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:57,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:57,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461989576] [2021-05-21 20:34:57,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461989576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:57,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583074176] [2021-05-21 20:34:57,123 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 [2021-05-21 20:34:57,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:57,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:57,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:57,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583074176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:57,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:57,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:57,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768314137] [2021-05-21 20:34:57,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:57,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:57,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:57,326 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:57,496 INFO L93 Difference]: Finished difference Result 153 states and 296 transitions. [2021-05-21 20:34:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:57,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:57,497 INFO L225 Difference]: With dead ends: 153 [2021-05-21 20:34:57,497 INFO L226 Difference]: Without dead ends: 146 [2021-05-21 20:34:57,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-21 20:34:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2021-05-21 20:34:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-05-21 20:34:57,498 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-05-21 20:34:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:57,498 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-05-21 20:34:57,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-05-21 20:34:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:57,499 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:57,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:57,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-05-21 20:34:57,705 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2143906226, now seen corresponding path program 153 times [2021-05-21 20:34:57,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:57,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259732153] [2021-05-21 20:34:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:57,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:57,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259732153] [2021-05-21 20:34:57,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259732153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:57,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513944495] [2021-05-21 20:34:57,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:34:57,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:34:57,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:57,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:57,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513944495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:57,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:57,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:57,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216602316] [2021-05-21 20:34:57,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:57,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:57,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:57,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:57,999 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:58,199 INFO L93 Difference]: Finished difference Result 140 states and 278 transitions. [2021-05-21 20:34:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:58,199 INFO L225 Difference]: With dead ends: 140 [2021-05-21 20:34:58,199 INFO L226 Difference]: Without dead ends: 133 [2021-05-21 20:34:58,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-21 20:34:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2021-05-21 20:34:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-05-21 20:34:58,201 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 19 [2021-05-21 20:34:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:58,201 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-05-21 20:34:58,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-05-21 20:34:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:58,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:58,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:58,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:58,416 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash -13196262, now seen corresponding path program 154 times [2021-05-21 20:34:58,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:58,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879800291] [2021-05-21 20:34:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:58,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:58,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879800291] [2021-05-21 20:34:58,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879800291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:58,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387971282] [2021-05-21 20:34:58,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:58,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:58,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:58,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:58,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387971282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:58,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:58,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:58,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732287972] [2021-05-21 20:34:58,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:58,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:58,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:58,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:58,704 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:58,938 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-05-21 20:34:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:58,939 INFO L225 Difference]: With dead ends: 150 [2021-05-21 20:34:58,939 INFO L226 Difference]: Without dead ends: 143 [2021-05-21 20:34:58,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:58,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-21 20:34:58,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-05-21 20:34:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-05-21 20:34:58,940 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-05-21 20:34:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:58,940 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-05-21 20:34:58,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-05-21 20:34:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:58,940 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:58,940 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:59,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:59,141 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2264534, now seen corresponding path program 155 times [2021-05-21 20:34:59,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:59,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745377488] [2021-05-21 20:34:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:59,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:59,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745377488] [2021-05-21 20:34:59,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745377488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:59,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215763894] [2021-05-21 20:34:59,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:59,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:34:59,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:59,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:59,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215763894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:59,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:59,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:34:59,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463304524] [2021-05-21 20:34:59,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:34:59,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:59,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:34:59,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:34:59,419 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:59,593 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-05-21 20:34:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:34:59,593 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:34:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:59,593 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:34:59,593 INFO L226 Difference]: Without dead ends: 149 [2021-05-21 20:34:59,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:34:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-21 20:34:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 106. [2021-05-21 20:34:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-05-21 20:34:59,594 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-05-21 20:34:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:59,595 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-05-21 20:34:59,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:34:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-05-21 20:34:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:34:59,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:59,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:59,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2021-05-21 20:34:59,795 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:59,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:59,796 INFO L82 PathProgramCache]: Analyzing trace with hash 573719340, now seen corresponding path program 156 times [2021-05-21 20:34:59,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:59,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541457493] [2021-05-21 20:34:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:59,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:59,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541457493] [2021-05-21 20:34:59,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541457493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:59,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752320308] [2021-05-21 20:34:59,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:59,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:59,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:59,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:34:59,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:00,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752320308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:00,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:00,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:00,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312515842] [2021-05-21 20:35:00,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:00,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:00,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:00,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:00,106 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:00,269 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-05-21 20:35:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:35:00,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:00,270 INFO L225 Difference]: With dead ends: 133 [2021-05-21 20:35:00,270 INFO L226 Difference]: Without dead ends: 126 [2021-05-21 20:35:00,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:35:00,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-21 20:35:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2021-05-21 20:35:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 211 transitions. [2021-05-21 20:35:00,271 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 211 transitions. Word has length 19 [2021-05-21 20:35:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:00,271 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 211 transitions. [2021-05-21 20:35:00,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 211 transitions. [2021-05-21 20:35:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:00,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:00,272 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:00,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:00,472 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:00,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:00,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1107287850, now seen corresponding path program 157 times [2021-05-21 20:35:00,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:00,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129099507] [2021-05-21 20:35:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:00,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:00,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129099507] [2021-05-21 20:35:00,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129099507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:00,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418407688] [2021-05-21 20:35:00,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:00,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418407688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:00,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:00,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:00,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706618111] [2021-05-21 20:35:00,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:00,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:00,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:00,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:00,792 INFO L87 Difference]: Start difference. First operand 104 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:01,019 INFO L93 Difference]: Finished difference Result 168 states and 326 transitions. [2021-05-21 20:35:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:35:01,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:01,020 INFO L225 Difference]: With dead ends: 168 [2021-05-21 20:35:01,020 INFO L226 Difference]: Without dead ends: 161 [2021-05-21 20:35:01,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-21 20:35:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2021-05-21 20:35:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-05-21 20:35:01,036 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 19 [2021-05-21 20:35:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:01,036 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-05-21 20:35:01,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:01,036 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-05-21 20:35:01,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:01,036 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:01,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:01,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:01,252 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:01,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1091827054, now seen corresponding path program 158 times [2021-05-21 20:35:01,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:01,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832150831] [2021-05-21 20:35:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:01,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:01,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832150831] [2021-05-21 20:35:01,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832150831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:01,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803595724] [2021-05-21 20:35:01,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:01,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:01,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:01,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:01,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803595724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:01,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:01,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:01,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908561833] [2021-05-21 20:35:01,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:01,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:01,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:01,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:01,533 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:01,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:01,807 INFO L93 Difference]: Finished difference Result 174 states and 337 transitions. [2021-05-21 20:35:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:35:01,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:01,807 INFO L225 Difference]: With dead ends: 174 [2021-05-21 20:35:01,807 INFO L226 Difference]: Without dead ends: 167 [2021-05-21 20:35:01,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-21 20:35:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-05-21 20:35:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-05-21 20:35:01,809 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 19 [2021-05-21 20:35:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:01,809 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-05-21 20:35:01,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-05-21 20:35:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:01,809 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:01,809 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:02,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-21 20:35:02,010 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:02,010 INFO L82 PathProgramCache]: Analyzing trace with hash -520372248, now seen corresponding path program 159 times [2021-05-21 20:35:02,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:02,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58860265] [2021-05-21 20:35:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:02,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:02,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58860265] [2021-05-21 20:35:02,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58860265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:02,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882354974] [2021-05-21 20:35:02,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:02,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:02,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:02,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:02,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:02,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882354974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:02,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:02,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:02,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405985752] [2021-05-21 20:35:02,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:02,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:02,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:02,311 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:02,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:02,499 INFO L93 Difference]: Finished difference Result 153 states and 299 transitions. [2021-05-21 20:35:02,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:35:02,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:02,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:02,499 INFO L225 Difference]: With dead ends: 153 [2021-05-21 20:35:02,499 INFO L226 Difference]: Without dead ends: 146 [2021-05-21 20:35:02,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:35:02,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-21 20:35:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2021-05-21 20:35:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 104 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 215 transitions. [2021-05-21 20:35:02,501 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 215 transitions. Word has length 19 [2021-05-21 20:35:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:02,501 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 215 transitions. [2021-05-21 20:35:02,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 215 transitions. [2021-05-21 20:35:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:02,501 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:02,501 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:02,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-05-21 20:35:02,701 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:02,702 INFO L82 PathProgramCache]: Analyzing trace with hash 917043286, now seen corresponding path program 160 times [2021-05-21 20:35:02,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:02,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524148867] [2021-05-21 20:35:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:02,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:02,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524148867] [2021-05-21 20:35:02,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524148867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:02,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594054522] [2021-05-21 20:35:02,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:02,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:02,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:02,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:02,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:02,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594054522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:02,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:02,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:02,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215263775] [2021-05-21 20:35:02,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:02,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:02,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:02,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:02,940 INFO L87 Difference]: Start difference. First operand 105 states and 215 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:03,569 INFO L93 Difference]: Finished difference Result 196 states and 368 transitions. [2021-05-21 20:35:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:35:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:03,570 INFO L225 Difference]: With dead ends: 196 [2021-05-21 20:35:03,570 INFO L226 Difference]: Without dead ends: 149 [2021-05-21 20:35:03,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 566.0ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:35:03,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-21 20:35:03,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-05-21 20:35:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.086206896551724) internal successors, (242), 116 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 242 transitions. [2021-05-21 20:35:03,584 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 242 transitions. Word has length 19 [2021-05-21 20:35:03,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:03,584 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 242 transitions. [2021-05-21 20:35:03,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 242 transitions. [2021-05-21 20:35:03,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:03,585 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:03,585 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:03,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-21 20:35:03,795 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:03,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash 534322898, now seen corresponding path program 161 times [2021-05-21 20:35:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:03,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214866170] [2021-05-21 20:35:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:03,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214866170] [2021-05-21 20:35:03,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214866170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647451808] [2021-05-21 20:35:03,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:03,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:35:03,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:03,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:03,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:04,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647451808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:04,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:04,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:04,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467182270] [2021-05-21 20:35:04,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:04,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:04,229 INFO L87 Difference]: Start difference. First operand 117 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:04,694 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-05-21 20:35:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:35:04,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:04,694 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:35:04,694 INFO L226 Difference]: Without dead ends: 149 [2021-05-21 20:35:04,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-21 20:35:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2021-05-21 20:35:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-05-21 20:35:04,696 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-05-21 20:35:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:04,696 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-05-21 20:35:04,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:04,696 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-05-21 20:35:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:04,696 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:04,696 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:04,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-21 20:35:04,897 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1681350570, now seen corresponding path program 162 times [2021-05-21 20:35:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:04,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467514105] [2021-05-21 20:35:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:04,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:04,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467514105] [2021-05-21 20:35:04,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467514105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:04,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250410145] [2021-05-21 20:35:04,975 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 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 [2021-05-21 20:35:04,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:04,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:04,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:05,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250410145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:05,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:05,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:05,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905019047] [2021-05-21 20:35:05,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:05,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:05,205 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:05,815 INFO L93 Difference]: Finished difference Result 206 states and 402 transitions. [2021-05-21 20:35:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:35:05,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:05,815 INFO L225 Difference]: With dead ends: 206 [2021-05-21 20:35:05,815 INFO L226 Difference]: Without dead ends: 199 [2021-05-21 20:35:05,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 576.5ms TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:35:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-21 20:35:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 114. [2021-05-21 20:35:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-05-21 20:35:05,817 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 19 [2021-05-21 20:35:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:05,817 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-05-21 20:35:05,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-05-21 20:35:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:05,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:05,817 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:06,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-05-21 20:35:06,018 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1665889774, now seen corresponding path program 163 times [2021-05-21 20:35:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:06,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968655376] [2021-05-21 20:35:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:06,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968655376] [2021-05-21 20:35:06,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968655376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531307567] [2021-05-21 20:35:06,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:06,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:06,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:06,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531307567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:06,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:06,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:06,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237211070] [2021-05-21 20:35:06,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:06,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:06,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:06,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:06,615 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:07,242 INFO L93 Difference]: Finished difference Result 197 states and 390 transitions. [2021-05-21 20:35:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:35:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:07,243 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:35:07,243 INFO L226 Difference]: Without dead ends: 190 [2021-05-21 20:35:07,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:35:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-21 20:35:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 112. [2021-05-21 20:35:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-05-21 20:35:07,245 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-05-21 20:35:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:07,245 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-05-21 20:35:07,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-05-21 20:35:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:07,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:07,245 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:07,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:07,449 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:07,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1058227826, now seen corresponding path program 164 times [2021-05-21 20:35:07,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:07,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189065745] [2021-05-21 20:35:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:07,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:07,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189065745] [2021-05-21 20:35:07,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189065745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:07,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98342779] [2021-05-21 20:35:07,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:07,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:07,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:07,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:07,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:07,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98342779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:07,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:07,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:07,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51380009] [2021-05-21 20:35:07,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:07,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:07,742 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:07,971 INFO L93 Difference]: Finished difference Result 158 states and 311 transitions. [2021-05-21 20:35:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:35:07,971 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:07,971 INFO L225 Difference]: With dead ends: 158 [2021-05-21 20:35:07,971 INFO L226 Difference]: Without dead ends: 151 [2021-05-21 20:35:07,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:07,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-21 20:35:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 109. [2021-05-21 20:35:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-05-21 20:35:07,973 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-05-21 20:35:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:07,973 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-05-21 20:35:07,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-05-21 20:35:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:07,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:07,973 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:08,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:08,174 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1703746494, now seen corresponding path program 165 times [2021-05-21 20:35:08,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:08,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99683866] [2021-05-21 20:35:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:08,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:08,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99683866] [2021-05-21 20:35:08,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99683866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:08,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030402664] [2021-05-21 20:35:08,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:08,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:35:08,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:08,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:08,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030402664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:08,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:08,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:08,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751916314] [2021-05-21 20:35:08,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:08,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:08,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:08,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:08,478 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:08,653 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-05-21 20:35:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:35:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:08,653 INFO L225 Difference]: With dead ends: 128 [2021-05-21 20:35:08,653 INFO L226 Difference]: Without dead ends: 121 [2021-05-21 20:35:08,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:35:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-21 20:35:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-05-21 20:35:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-05-21 20:35:08,654 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-05-21 20:35:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:08,654 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-05-21 20:35:08,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-05-21 20:35:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:08,655 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:08,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:08,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:08,855 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:08,856 INFO L82 PathProgramCache]: Analyzing trace with hash 375547334, now seen corresponding path program 166 times [2021-05-21 20:35:08,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:08,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994864174] [2021-05-21 20:35:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:08,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:08,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994864174] [2021-05-21 20:35:08,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994864174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:08,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32891916] [2021-05-21 20:35:08,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:08,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:08,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:08,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:09,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32891916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:09,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:09,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:09,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404083067] [2021-05-21 20:35:09,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:09,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:09,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:09,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:09,162 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:09,351 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-05-21 20:35:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:35:09,351 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:09,352 INFO L225 Difference]: With dead ends: 151 [2021-05-21 20:35:09,352 INFO L226 Difference]: Without dead ends: 144 [2021-05-21 20:35:09,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:35:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-21 20:35:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-05-21 20:35:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-05-21 20:35:09,353 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-05-21 20:35:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:09,353 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-05-21 20:35:09,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-05-21 20:35:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:09,353 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:09,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:09,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:09,554 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash 391008130, now seen corresponding path program 167 times [2021-05-21 20:35:09,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:09,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116501218] [2021-05-21 20:35:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:09,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:09,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116501218] [2021-05-21 20:35:09,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116501218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:09,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716997550] [2021-05-21 20:35:09,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:09,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:35:09,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:09,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:09,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716997550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:09,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:09,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:09,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797333647] [2021-05-21 20:35:09,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:09,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:09,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:09,883 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:10,094 INFO L93 Difference]: Finished difference Result 138 states and 279 transitions. [2021-05-21 20:35:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:35:10,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:10,095 INFO L225 Difference]: With dead ends: 138 [2021-05-21 20:35:10,095 INFO L226 Difference]: Without dead ends: 131 [2021-05-21 20:35:10,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:35:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-21 20:35:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-05-21 20:35:10,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-05-21 20:35:10,096 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-05-21 20:35:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:10,096 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-05-21 20:35:10,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-05-21 20:35:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:10,097 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:10,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:10,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:10,297 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1773249202, now seen corresponding path program 168 times [2021-05-21 20:35:10,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:10,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760611857] [2021-05-21 20:35:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:10,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760611857] [2021-05-21 20:35:10,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760611857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542972166] [2021-05-21 20:35:10,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:10,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:35:10,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:10,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:10,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:10,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542972166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:10,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:10,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:10,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543599820] [2021-05-21 20:35:10,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:10,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:10,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:10,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:10,618 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:10,886 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-05-21 20:35:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:35:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:10,886 INFO L225 Difference]: With dead ends: 152 [2021-05-21 20:35:10,886 INFO L226 Difference]: Without dead ends: 145 [2021-05-21 20:35:10,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:35:10,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-21 20:35:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-05-21 20:35:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-05-21 20:35:10,888 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-05-21 20:35:10,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:10,888 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-05-21 20:35:10,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-05-21 20:35:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:10,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:10,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:11,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:11,088 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1757788406, now seen corresponding path program 169 times [2021-05-21 20:35:11,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:11,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398651252] [2021-05-21 20:35:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:11,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:11,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398651252] [2021-05-21 20:35:11,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398651252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:11,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362548221] [2021-05-21 20:35:11,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:11,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362548221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:11,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:11,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:11,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355773066] [2021-05-21 20:35:11,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:11,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:11,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:11,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:11,389 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:11,666 INFO L93 Difference]: Finished difference Result 158 states and 312 transitions. [2021-05-21 20:35:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:35:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:11,667 INFO L225 Difference]: With dead ends: 158 [2021-05-21 20:35:11,667 INFO L226 Difference]: Without dead ends: 151 [2021-05-21 20:35:11,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:35:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-21 20:35:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2021-05-21 20:35:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-05-21 20:35:11,668 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-05-21 20:35:11,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:11,668 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-05-21 20:35:11,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-05-21 20:35:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:11,669 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:11,669 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:11,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-21 20:35:11,869 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:11,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1186333600, now seen corresponding path program 170 times [2021-05-21 20:35:11,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:11,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594763540] [2021-05-21 20:35:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:11,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:11,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594763540] [2021-05-21 20:35:11,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594763540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:11,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691132718] [2021-05-21 20:35:11,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:11,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:11,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:12,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691132718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:12,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:12,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:12,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197861655] [2021-05-21 20:35:12,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:12,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:12,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:12,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:12,164 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:12,326 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-05-21 20:35:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:35:12,327 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:12,327 INFO L225 Difference]: With dead ends: 132 [2021-05-21 20:35:12,327 INFO L226 Difference]: Without dead ends: 125 [2021-05-21 20:35:12,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-21 20:35:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-05-21 20:35:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-05-21 20:35:12,328 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 19 [2021-05-21 20:35:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:12,328 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-05-21 20:35:12,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-05-21 20:35:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:12,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:12,329 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:12,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-21 20:35:12,529 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:12,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1427626506, now seen corresponding path program 171 times [2021-05-21 20:35:12,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:12,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122572115] [2021-05-21 20:35:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:12,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:12,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122572115] [2021-05-21 20:35:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122572115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808541503] [2021-05-21 20:35:12,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:12,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:35:12,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:12,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:12,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808541503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:12,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:12,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:12,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676743864] [2021-05-21 20:35:12,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:12,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:12,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:12,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:12,837 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:13,147 INFO L93 Difference]: Finished difference Result 173 states and 341 transitions. [2021-05-21 20:35:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:35:13,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:13,147 INFO L225 Difference]: With dead ends: 173 [2021-05-21 20:35:13,147 INFO L226 Difference]: Without dead ends: 166 [2021-05-21 20:35:13,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:35:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-21 20:35:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2021-05-21 20:35:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-05-21 20:35:13,149 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-05-21 20:35:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:13,149 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-05-21 20:35:13,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-05-21 20:35:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:13,149 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:13,149 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:13,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-21 20:35:13,350 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:13,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:13,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1443087302, now seen corresponding path program 172 times [2021-05-21 20:35:13,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:13,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761903194] [2021-05-21 20:35:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:13,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:13,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761903194] [2021-05-21 20:35:13,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761903194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:13,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170394707] [2021-05-21 20:35:13,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:13,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:13,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:13,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:13,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:13,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170394707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:13,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:13,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:13,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254760991] [2021-05-21 20:35:13,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:13,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:13,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:13,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:13,652 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:13,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:13,954 INFO L93 Difference]: Finished difference Result 179 states and 352 transitions. [2021-05-21 20:35:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:35:13,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:13,954 INFO L225 Difference]: With dead ends: 179 [2021-05-21 20:35:13,955 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:35:13,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:35:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:35:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 112. [2021-05-21 20:35:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-05-21 20:35:13,956 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-05-21 20:35:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:13,956 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-05-21 20:35:13,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-05-21 20:35:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:13,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:13,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:14,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:14,157 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2014542108, now seen corresponding path program 173 times [2021-05-21 20:35:14,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:14,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474276056] [2021-05-21 20:35:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:14,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:14,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474276056] [2021-05-21 20:35:14,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474276056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:14,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744211766] [2021-05-21 20:35:14,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:14,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:35:14,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:14,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:14,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:14,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744211766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:14,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:14,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:14,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345015731] [2021-05-21 20:35:14,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:14,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:14,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:14,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:14,472 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:14,711 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-05-21 20:35:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:35:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:14,712 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:35:14,712 INFO L226 Difference]: Without dead ends: 149 [2021-05-21 20:35:14,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-21 20:35:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2021-05-21 20:35:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-05-21 20:35:14,713 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-05-21 20:35:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:14,713 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-05-21 20:35:14,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-05-21 20:35:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:14,713 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:14,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:14,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:14,914 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1476686530, now seen corresponding path program 174 times [2021-05-21 20:35:14,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:14,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556570067] [2021-05-21 20:35:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:14,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:14,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556570067] [2021-05-21 20:35:14,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556570067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:14,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940664871] [2021-05-21 20:35:14,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:15,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:15,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:15,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:15,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940664871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:15,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:15,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:15,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590308610] [2021-05-21 20:35:15,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:15,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:15,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:15,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:15,213 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:15,422 INFO L93 Difference]: Finished difference Result 150 states and 298 transitions. [2021-05-21 20:35:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:35:15,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:15,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:15,423 INFO L225 Difference]: With dead ends: 150 [2021-05-21 20:35:15,423 INFO L226 Difference]: Without dead ends: 143 [2021-05-21 20:35:15,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-21 20:35:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-05-21 20:35:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-05-21 20:35:15,424 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-05-21 20:35:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:15,424 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-05-21 20:35:15,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-05-21 20:35:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:15,425 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:15,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:15,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-05-21 20:35:15,625 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:15,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1981542510, now seen corresponding path program 175 times [2021-05-21 20:35:15,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:15,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333644212] [2021-05-21 20:35:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:15,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:15,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333644212] [2021-05-21 20:35:15,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333644212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:15,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417750149] [2021-05-21 20:35:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:15,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:15,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:15,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417750149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:15,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:15,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:15,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245532118] [2021-05-21 20:35:15,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:15,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:15,928 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:16,234 INFO L93 Difference]: Finished difference Result 173 states and 338 transitions. [2021-05-21 20:35:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:35:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:16,234 INFO L225 Difference]: With dead ends: 173 [2021-05-21 20:35:16,234 INFO L226 Difference]: Without dead ends: 166 [2021-05-21 20:35:16,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-21 20:35:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2021-05-21 20:35:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-05-21 20:35:16,236 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 19 [2021-05-21 20:35:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:16,236 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-05-21 20:35:16,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-05-21 20:35:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:16,236 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:16,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:16,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:16,437 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1966081714, now seen corresponding path program 176 times [2021-05-21 20:35:16,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:16,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439729698] [2021-05-21 20:35:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:16,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:16,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439729698] [2021-05-21 20:35:16,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439729698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:16,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310839668] [2021-05-21 20:35:16,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:16,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:16,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:16,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:16,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:16,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310839668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:16,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:16,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:16,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639021816] [2021-05-21 20:35:16,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:16,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:16,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:16,728 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:16,991 INFO L93 Difference]: Finished difference Result 179 states and 349 transitions. [2021-05-21 20:35:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:35:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:16,991 INFO L225 Difference]: With dead ends: 179 [2021-05-21 20:35:16,991 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:35:16,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:35:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-05-21 20:35:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2021-05-21 20:35:16,993 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 19 [2021-05-21 20:35:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:16,993 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2021-05-21 20:35:16,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2021-05-21 20:35:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:16,993 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:16,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:17,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:17,194 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:17,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1394626908, now seen corresponding path program 177 times [2021-05-21 20:35:17,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:17,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127548520] [2021-05-21 20:35:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:17,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:17,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127548520] [2021-05-21 20:35:17,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127548520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:17,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394718565] [2021-05-21 20:35:17,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:17,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:17,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:17,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:17,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394718565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:17,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:17,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:17,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695917186] [2021-05-21 20:35:17,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:17,483 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:17,715 INFO L93 Difference]: Finished difference Result 152 states and 300 transitions. [2021-05-21 20:35:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:35:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:17,716 INFO L225 Difference]: With dead ends: 152 [2021-05-21 20:35:17,716 INFO L226 Difference]: Without dead ends: 145 [2021-05-21 20:35:17,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:17,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-21 20:35:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 109. [2021-05-21 20:35:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-05-21 20:35:17,718 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-05-21 20:35:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:17,718 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-05-21 20:35:17,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-05-21 20:35:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:17,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:17,718 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:17,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:17,918 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash 42788626, now seen corresponding path program 178 times [2021-05-21 20:35:17,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:17,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599946478] [2021-05-21 20:35:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:17,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:17,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599946478] [2021-05-21 20:35:17,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599946478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:17,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299907094] [2021-05-21 20:35:17,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:18,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:18,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:18,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:18,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299907094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:18,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:18,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046805169] [2021-05-21 20:35:18,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:18,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:18,183 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:18,473 INFO L93 Difference]: Finished difference Result 175 states and 335 transitions. [2021-05-21 20:35:18,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:35:18,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:18,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:18,473 INFO L225 Difference]: With dead ends: 175 [2021-05-21 20:35:18,474 INFO L226 Difference]: Without dead ends: 161 [2021-05-21 20:35:18,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:35:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-21 20:35:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-05-21 20:35:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-05-21 20:35:18,475 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-05-21 20:35:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:18,475 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-05-21 20:35:18,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-05-21 20:35:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:18,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:18,475 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:18,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:18,676 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:18,676 INFO L82 PathProgramCache]: Analyzing trace with hash -339931762, now seen corresponding path program 179 times [2021-05-21 20:35:18,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:18,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053946202] [2021-05-21 20:35:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:18,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:18,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053946202] [2021-05-21 20:35:18,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053946202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:18,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270739377] [2021-05-21 20:35:18,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:18,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:35:18,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:18,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:19,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270739377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:19,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:19,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:19,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203166373] [2021-05-21 20:35:19,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:19,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:19,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:19,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:19,044 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:19,341 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-05-21 20:35:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:35:19,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:19,342 INFO L225 Difference]: With dead ends: 163 [2021-05-21 20:35:19,342 INFO L226 Difference]: Without dead ends: 156 [2021-05-21 20:35:19,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:35:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-21 20:35:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-05-21 20:35:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.128205128205128) internal successors, (249), 117 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 249 transitions. [2021-05-21 20:35:19,343 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 249 transitions. Word has length 19 [2021-05-21 20:35:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:19,343 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 249 transitions. [2021-05-21 20:35:19,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 249 transitions. [2021-05-21 20:35:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:19,344 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:19,344 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:19,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:19,544 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1739362066, now seen corresponding path program 180 times [2021-05-21 20:35:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:19,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489434184] [2021-05-21 20:35:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:19,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:19,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489434184] [2021-05-21 20:35:19,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489434184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:19,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575763362] [2021-05-21 20:35:19,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:19,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:19,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:19,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:19,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:19,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575763362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:19,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:19,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:19,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337382922] [2021-05-21 20:35:19,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:19,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:19,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:19,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:19,812 INFO L87 Difference]: Start difference. First operand 118 states and 249 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:20,229 INFO L93 Difference]: Finished difference Result 208 states and 411 transitions. [2021-05-21 20:35:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:35:20,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:20,229 INFO L225 Difference]: With dead ends: 208 [2021-05-21 20:35:20,229 INFO L226 Difference]: Without dead ends: 201 [2021-05-21 20:35:20,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-21 20:35:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 119. [2021-05-21 20:35:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-05-21 20:35:20,231 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 19 [2021-05-21 20:35:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:20,231 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-05-21 20:35:20,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-05-21 20:35:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:20,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:20,231 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:20,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:20,446 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:20,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1754822862, now seen corresponding path program 181 times [2021-05-21 20:35:20,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:20,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785444668] [2021-05-21 20:35:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:20,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:20,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785444668] [2021-05-21 20:35:20,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785444668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:20,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114948254] [2021-05-21 20:35:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:20,546 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:20,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:20,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114948254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:20,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:20,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:20,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915336221] [2021-05-21 20:35:20,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:20,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:20,872 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:21,217 INFO L93 Difference]: Finished difference Result 198 states and 398 transitions. [2021-05-21 20:35:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:35:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:21,218 INFO L225 Difference]: With dead ends: 198 [2021-05-21 20:35:21,218 INFO L226 Difference]: Without dead ends: 191 [2021-05-21 20:35:21,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:35:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-21 20:35:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 117. [2021-05-21 20:35:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-05-21 20:35:21,219 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-05-21 20:35:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:21,220 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-05-21 20:35:21,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-05-21 20:35:21,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:21,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:21,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:21,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-21 20:35:21,420 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:21,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1932482486, now seen corresponding path program 182 times [2021-05-21 20:35:21,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:21,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122546683] [2021-05-21 20:35:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:21,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:21,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122546683] [2021-05-21 20:35:21,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122546683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:21,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173438999] [2021-05-21 20:35:21,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:21,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:21,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:21,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:35:21,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:21,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173438999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:21,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:21,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:21,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398332709] [2021-05-21 20:35:21,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:21,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:21,752 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:21,928 INFO L93 Difference]: Finished difference Result 164 states and 327 transitions. [2021-05-21 20:35:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:35:21,928 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-05-21 20:35:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:21,928 INFO L225 Difference]: With dead ends: 164 [2021-05-21 20:35:21,928 INFO L226 Difference]: Without dead ends: 157 [2021-05-21 20:35:21,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:35:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-21 20:35:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2021-05-21 20:35:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1043478260869564) internal successors, (242), 115 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 242 transitions. [2021-05-21 20:35:21,930 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 242 transitions. Word has length 19 [2021-05-21 20:35:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:21,930 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 242 transitions. [2021-05-21 20:35:21,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-05-21 20:35:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 242 transitions. [2021-05-21 20:35:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:21,930 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:21,930 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:22,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-21 20:35:22,137 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash 672760770, now seen corresponding path program 183 times [2021-05-21 20:35:22,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:22,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160047118] [2021-05-21 20:35:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:22,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:22,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160047118] [2021-05-21 20:35:22,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160047118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:22,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364600709] [2021-05-21 20:35:22,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:22,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:22,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:22,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:22,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:22,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364600709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:22,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:22,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:22,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660434100] [2021-05-21 20:35:22,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:22,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:22,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:22,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:22,420 INFO L87 Difference]: Start difference. First operand 116 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:22,669 INFO L93 Difference]: Finished difference Result 135 states and 272 transitions. [2021-05-21 20:35:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:35:22,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:22,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:22,670 INFO L225 Difference]: With dead ends: 135 [2021-05-21 20:35:22,670 INFO L226 Difference]: Without dead ends: 128 [2021-05-21 20:35:22,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:35:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-21 20:35:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-05-21 20:35:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-05-21 20:35:22,671 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-05-21 20:35:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:22,671 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-05-21 20:35:22,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-05-21 20:35:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:22,671 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:22,671 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:22,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:22,877 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1542912698, now seen corresponding path program 184 times [2021-05-21 20:35:22,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:22,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94901186] [2021-05-21 20:35:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:22,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:22,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94901186] [2021-05-21 20:35:22,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94901186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:22,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438793416] [2021-05-21 20:35:22,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:22,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:22,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:22,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:23,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438793416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:23,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:23,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:23,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076370764] [2021-05-21 20:35:23,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:23,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:23,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:23,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:23,142 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:23,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:23,485 INFO L93 Difference]: Finished difference Result 178 states and 353 transitions. [2021-05-21 20:35:23,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:35:23,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:23,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:23,486 INFO L225 Difference]: With dead ends: 178 [2021-05-21 20:35:23,486 INFO L226 Difference]: Without dead ends: 171 [2021-05-21 20:35:23,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:35:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-21 20:35:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-05-21 20:35:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-05-21 20:35:23,488 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-05-21 20:35:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:23,488 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-05-21 20:35:23,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-05-21 20:35:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:23,489 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:23,489 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:23,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-05-21 20:35:23,705 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:23,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1527451902, now seen corresponding path program 185 times [2021-05-21 20:35:23,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:23,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833861740] [2021-05-21 20:35:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:23,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:23,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833861740] [2021-05-21 20:35:23,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833861740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:23,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405026588] [2021-05-21 20:35:23,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:23,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:35:23,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:23,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:23,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:24,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405026588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:24,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:24,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:24,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463284530] [2021-05-21 20:35:24,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:24,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:24,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:24,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:24,010 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:24,360 INFO L93 Difference]: Finished difference Result 170 states and 343 transitions. [2021-05-21 20:35:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:35:24,360 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:24,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:24,361 INFO L225 Difference]: With dead ends: 170 [2021-05-21 20:35:24,361 INFO L226 Difference]: Without dead ends: 163 [2021-05-21 20:35:24,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:35:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-21 20:35:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2021-05-21 20:35:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-05-21 20:35:24,362 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-05-21 20:35:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:24,362 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-05-21 20:35:24,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-05-21 20:35:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:24,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:24,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:24,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:24,563 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:24,563 INFO L82 PathProgramCache]: Analyzing trace with hash 603258062, now seen corresponding path program 186 times [2021-05-21 20:35:24,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:24,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44839381] [2021-05-21 20:35:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:24,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:24,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44839381] [2021-05-21 20:35:24,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44839381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:24,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304072467] [2021-05-21 20:35:24,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:24,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:24,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:24,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:24,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304072467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:24,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:24,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:24,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777031776] [2021-05-21 20:35:24,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:24,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:24,862 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:25,196 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-05-21 20:35:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:35:25,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:25,197 INFO L225 Difference]: With dead ends: 170 [2021-05-21 20:35:25,197 INFO L226 Difference]: Without dead ends: 163 [2021-05-21 20:35:25,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:35:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-21 20:35:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-05-21 20:35:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-05-21 20:35:25,198 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-05-21 20:35:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:25,198 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-05-21 20:35:25,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-05-21 20:35:25,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:25,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:25,198 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:25,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-05-21 20:35:25,399 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:25,399 INFO L82 PathProgramCache]: Analyzing trace with hash 618718858, now seen corresponding path program 187 times [2021-05-21 20:35:25,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:25,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078276146] [2021-05-21 20:35:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:25,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:25,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078276146] [2021-05-21 20:35:25,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078276146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:25,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757386832] [2021-05-21 20:35:25,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:25,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:25,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:25,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757386832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:25,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:25,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:25,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665724102] [2021-05-21 20:35:25,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:25,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:25,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:25,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:25,956 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:26,269 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-05-21 20:35:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:35:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:26,270 INFO L225 Difference]: With dead ends: 182 [2021-05-21 20:35:26,270 INFO L226 Difference]: Without dead ends: 175 [2021-05-21 20:35:26,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:35:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-21 20:35:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 112. [2021-05-21 20:35:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-05-21 20:35:26,271 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-05-21 20:35:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:26,271 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-05-21 20:35:26,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-05-21 20:35:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:26,271 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:26,271 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:26,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:26,472 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:26,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1190173664, now seen corresponding path program 188 times [2021-05-21 20:35:26,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:26,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124012056] [2021-05-21 20:35:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:26,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:26,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124012056] [2021-05-21 20:35:26,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124012056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:26,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338262798] [2021-05-21 20:35:26,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:26,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:26,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:26,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:26,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338262798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:26,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:26,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 20:35:26,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048129271] [2021-05-21 20:35:26,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:35:26,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:35:26,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:26,916 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:27,218 INFO L93 Difference]: Finished difference Result 140 states and 281 transitions. [2021-05-21 20:35:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:35:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-05-21 20:35:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:27,219 INFO L225 Difference]: With dead ends: 140 [2021-05-21 20:35:27,219 INFO L226 Difference]: Without dead ends: 133 [2021-05-21 20:35:27,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:35:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-21 20:35:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-05-21 20:35:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-05-21 20:35:27,220 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-05-21 20:35:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:27,221 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-05-21 20:35:27,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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) [2021-05-21 20:35:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-05-21 20:35:27,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:27,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:27,221 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:27,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-05-21 20:35:27,421 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:27,422 INFO L82 PathProgramCache]: Analyzing trace with hash 668199066, now seen corresponding path program 189 times [2021-05-21 20:35:27,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:27,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021134390] [2021-05-21 20:35:27,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:27,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:27,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021134390] [2021-05-21 20:35:27,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021134390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:27,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675355082] [2021-05-21 20:35:27,507 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 [2021-05-21 20:35:27,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:27,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:27,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:27,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:27,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675355082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:27,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:27,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:27,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801569609] [2021-05-21 20:35:27,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:27,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:27,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:27,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:27,695 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:28,316 INFO L93 Difference]: Finished difference Result 201 states and 375 transitions. [2021-05-21 20:35:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:35:28,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:28,317 INFO L225 Difference]: With dead ends: 201 [2021-05-21 20:35:28,317 INFO L226 Difference]: Without dead ends: 154 [2021-05-21 20:35:28,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:35:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-21 20:35:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 117. [2021-05-21 20:35:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-05-21 20:35:28,318 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2021-05-21 20:35:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:28,318 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-05-21 20:35:28,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-05-21 20:35:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:28,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:28,318 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:28,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:28,519 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:28,519 INFO L82 PathProgramCache]: Analyzing trace with hash 285478678, now seen corresponding path program 190 times [2021-05-21 20:35:28,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:28,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786532270] [2021-05-21 20:35:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:28,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:28,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786532270] [2021-05-21 20:35:28,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786532270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:28,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40130695] [2021-05-21 20:35:28,593 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 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 [2021-05-21 20:35:28,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:28,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:28,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:28,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:28,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40130695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:28,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:28,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:28,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889131913] [2021-05-21 20:35:28,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:28,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:28,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:28,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:28,800 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:29,310 INFO L93 Difference]: Finished difference Result 161 states and 321 transitions. [2021-05-21 20:35:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:35:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:29,311 INFO L225 Difference]: With dead ends: 161 [2021-05-21 20:35:29,311 INFO L226 Difference]: Without dead ends: 154 [2021-05-21 20:35:29,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 445.9ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:35:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-21 20:35:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-05-21 20:35:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-05-21 20:35:29,312 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 19 [2021-05-21 20:35:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:29,312 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-05-21 20:35:29,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-05-21 20:35:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:29,313 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:29,313 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:29,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:29,528 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1930194790, now seen corresponding path program 191 times [2021-05-21 20:35:29,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:29,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985020719] [2021-05-21 20:35:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:29,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:29,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985020719] [2021-05-21 20:35:29,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985020719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:29,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801124852] [2021-05-21 20:35:29,613 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 [2021-05-21 20:35:29,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:35:29,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:29,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:29,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:29,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801124852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:29,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:29,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:29,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891882929] [2021-05-21 20:35:29,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:29,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:29,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:29,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:29,813 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:30,528 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-05-21 20:35:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:35:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:30,529 INFO L225 Difference]: With dead ends: 220 [2021-05-21 20:35:30,529 INFO L226 Difference]: Without dead ends: 213 [2021-05-21 20:35:30,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:35:30,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-21 20:35:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 114. [2021-05-21 20:35:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 113 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 239 transitions. [2021-05-21 20:35:30,530 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 239 transitions. Word has length 19 [2021-05-21 20:35:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:30,531 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 239 transitions. [2021-05-21 20:35:30,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 239 transitions. [2021-05-21 20:35:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:30,531 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:30,531 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:30,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-21 20:35:30,731 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:30,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1914733994, now seen corresponding path program 192 times [2021-05-21 20:35:30,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:30,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691617993] [2021-05-21 20:35:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:30,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:30,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691617993] [2021-05-21 20:35:30,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691617993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:30,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683921963] [2021-05-21 20:35:30,813 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 [2021-05-21 20:35:30,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:30,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:30,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:30,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:31,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683921963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:31,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:31,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:31,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762834404] [2021-05-21 20:35:31,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:31,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:31,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:31,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:31,012 INFO L87 Difference]: Start difference. First operand 114 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:31,646 INFO L93 Difference]: Finished difference Result 210 states and 423 transitions. [2021-05-21 20:35:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:35:31,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:31,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:31,647 INFO L225 Difference]: With dead ends: 210 [2021-05-21 20:35:31,647 INFO L226 Difference]: Without dead ends: 203 [2021-05-21 20:35:31,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:35:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-21 20:35:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 109. [2021-05-21 20:35:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-05-21 20:35:31,649 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-05-21 20:35:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:31,649 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-05-21 20:35:31,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-05-21 20:35:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:31,649 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:31,649 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:31,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-05-21 20:35:31,849 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash -206055594, now seen corresponding path program 193 times [2021-05-21 20:35:31,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:31,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750049160] [2021-05-21 20:35:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:31,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:31,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750049160] [2021-05-21 20:35:31,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750049160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:31,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754244704] [2021-05-21 20:35:31,923 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 [2021-05-21 20:35:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:31,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:31,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:32,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754244704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:32,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:32,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:32,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344379164] [2021-05-21 20:35:32,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:32,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:32,110 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:32,383 INFO L93 Difference]: Finished difference Result 186 states and 351 transitions. [2021-05-21 20:35:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:35:32,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:32,384 INFO L225 Difference]: With dead ends: 186 [2021-05-21 20:35:32,384 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:35:32,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:35:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:35:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 117. [2021-05-21 20:35:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-05-21 20:35:32,385 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 19 [2021-05-21 20:35:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:32,385 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-05-21 20:35:32,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-05-21 20:35:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:32,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:32,385 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:32,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-21 20:35:32,586 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:32,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:32,586 INFO L82 PathProgramCache]: Analyzing trace with hash -588775982, now seen corresponding path program 194 times [2021-05-21 20:35:32,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:32,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958151212] [2021-05-21 20:35:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:32,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958151212] [2021-05-21 20:35:32,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958151212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025787339] [2021-05-21 20:35:32,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:32,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:32,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:32,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:32,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025787339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:32,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:32,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:32,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989130853] [2021-05-21 20:35:32,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:32,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:32,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:32,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:32,888 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:33,253 INFO L93 Difference]: Finished difference Result 170 states and 340 transitions. [2021-05-21 20:35:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:35:33,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:33,253 INFO L225 Difference]: With dead ends: 170 [2021-05-21 20:35:33,253 INFO L226 Difference]: Without dead ends: 163 [2021-05-21 20:35:33,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:35:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-21 20:35:33,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2021-05-21 20:35:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1196581196581197) internal successors, (248), 117 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 248 transitions. [2021-05-21 20:35:33,255 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 248 transitions. Word has length 19 [2021-05-21 20:35:33,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:33,255 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 248 transitions. [2021-05-21 20:35:33,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 248 transitions. [2021-05-21 20:35:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:33,255 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:33,255 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:33,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-21 20:35:33,465 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1490517846, now seen corresponding path program 195 times [2021-05-21 20:35:33,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:33,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740585597] [2021-05-21 20:35:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:33,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:33,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740585597] [2021-05-21 20:35:33,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740585597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:33,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28271968] [2021-05-21 20:35:33,558 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 [2021-05-21 20:35:33,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:33,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:33,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:33,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28271968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:33,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:33,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:33,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088267010] [2021-05-21 20:35:33,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:33,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:33,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:33,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:33,745 INFO L87 Difference]: Start difference. First operand 118 states and 248 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:34,225 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-05-21 20:35:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:35:34,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:34,226 INFO L225 Difference]: With dead ends: 217 [2021-05-21 20:35:34,226 INFO L226 Difference]: Without dead ends: 210 [2021-05-21 20:35:34,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:35:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-21 20:35:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 119. [2021-05-21 20:35:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-05-21 20:35:34,227 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 19 [2021-05-21 20:35:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:34,227 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-05-21 20:35:34,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-05-21 20:35:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:34,228 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:34,228 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:34,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-05-21 20:35:34,443 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1505978642, now seen corresponding path program 196 times [2021-05-21 20:35:34,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:34,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115458853] [2021-05-21 20:35:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:34,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:34,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115458853] [2021-05-21 20:35:34,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115458853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:34,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181435538] [2021-05-21 20:35:34,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:34,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:34,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:34,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181435538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:34,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:34,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:34,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856072458] [2021-05-21 20:35:34,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:34,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:34,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:34,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:34,740 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:35,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:35,181 INFO L93 Difference]: Finished difference Result 206 states and 418 transitions. [2021-05-21 20:35:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:35:35,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:35,181 INFO L225 Difference]: With dead ends: 206 [2021-05-21 20:35:35,181 INFO L226 Difference]: Without dead ends: 199 [2021-05-21 20:35:35,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-21 20:35:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 116. [2021-05-21 20:35:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-05-21 20:35:35,197 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 19 [2021-05-21 20:35:35,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:35,197 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-05-21 20:35:35,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-05-21 20:35:35,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:35,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:35,198 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:35,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:35,416 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash 423916550, now seen corresponding path program 197 times [2021-05-21 20:35:35,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:35,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472512571] [2021-05-21 20:35:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:35,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:35,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472512571] [2021-05-21 20:35:35,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472512571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:35,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693165388] [2021-05-21 20:35:35,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:35,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:35:35,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:35,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:35,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:35,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693165388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:35,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:35,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:35,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91201212] [2021-05-21 20:35:35,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:35,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:35,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:35,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:35,726 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:36,020 INFO L93 Difference]: Finished difference Result 145 states and 290 transitions. [2021-05-21 20:35:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:35:36,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:36,021 INFO L225 Difference]: With dead ends: 145 [2021-05-21 20:35:36,021 INFO L226 Difference]: Without dead ends: 138 [2021-05-21 20:35:36,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:35:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-21 20:35:36,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-05-21 20:35:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-05-21 20:35:36,022 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-05-21 20:35:36,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:36,022 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-05-21 20:35:36,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:36,023 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-05-21 20:35:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:36,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:36,023 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:36,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-21 20:35:36,223 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:36,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:36,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1791756918, now seen corresponding path program 198 times [2021-05-21 20:35:36,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:36,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556680890] [2021-05-21 20:35:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:36,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556680890] [2021-05-21 20:35:36,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556680890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000198814] [2021-05-21 20:35:36,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:36,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:36,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:36,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:36,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:36,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000198814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:36,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:36,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239059889] [2021-05-21 20:35:36,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:36,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:36,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:36,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:36,516 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:36,908 INFO L93 Difference]: Finished difference Result 190 states and 377 transitions. [2021-05-21 20:35:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:35:36,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:36,909 INFO L225 Difference]: With dead ends: 190 [2021-05-21 20:35:36,909 INFO L226 Difference]: Without dead ends: 183 [2021-05-21 20:35:36,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:35:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-21 20:35:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 113. [2021-05-21 20:35:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-05-21 20:35:36,911 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-05-21 20:35:36,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:36,911 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-05-21 20:35:36,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-05-21 20:35:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:36,911 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:36,911 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:37,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-05-21 20:35:37,112 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1776296122, now seen corresponding path program 199 times [2021-05-21 20:35:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:37,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073847425] [2021-05-21 20:35:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:37,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:37,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073847425] [2021-05-21 20:35:37,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073847425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:37,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35319396] [2021-05-21 20:35:37,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:37,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:37,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:37,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35319396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:37,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:37,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:37,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391286066] [2021-05-21 20:35:37,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:37,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:37,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:37,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:37,529 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:37,905 INFO L93 Difference]: Finished difference Result 181 states and 367 transitions. [2021-05-21 20:35:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:35:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:37,905 INFO L225 Difference]: With dead ends: 181 [2021-05-21 20:35:37,905 INFO L226 Difference]: Without dead ends: 174 [2021-05-21 20:35:37,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:35:37,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-21 20:35:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 111. [2021-05-21 20:35:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-05-21 20:35:37,907 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-05-21 20:35:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:37,907 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-05-21 20:35:37,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-05-21 20:35:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:37,907 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:37,907 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:38,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:38,108 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:38,108 INFO L82 PathProgramCache]: Analyzing trace with hash 354413842, now seen corresponding path program 200 times [2021-05-21 20:35:38,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:38,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192580299] [2021-05-21 20:35:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:38,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:38,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192580299] [2021-05-21 20:35:38,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192580299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:38,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142171145] [2021-05-21 20:35:38,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:38,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:38,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:38,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:38,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:38,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142171145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:38,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:38,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:38,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175622893] [2021-05-21 20:35:38,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:38,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:38,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:38,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:38,379 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:38,708 INFO L93 Difference]: Finished difference Result 186 states and 370 transitions. [2021-05-21 20:35:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:35:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:38,709 INFO L225 Difference]: With dead ends: 186 [2021-05-21 20:35:38,709 INFO L226 Difference]: Without dead ends: 179 [2021-05-21 20:35:38,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:35:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-21 20:35:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-05-21 20:35:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-05-21 20:35:38,711 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-05-21 20:35:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:38,711 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-05-21 20:35:38,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-05-21 20:35:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:38,711 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:38,711 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:38,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-05-21 20:35:38,911 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash 369874638, now seen corresponding path program 201 times [2021-05-21 20:35:38,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:38,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680978370] [2021-05-21 20:35:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:38,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:38,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680978370] [2021-05-21 20:35:38,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680978370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:38,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545124838] [2021-05-21 20:35:38,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:39,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:39,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:39,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:39,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545124838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:39,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:39,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:39,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924949993] [2021-05-21 20:35:39,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:39,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:39,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:39,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:39,179 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:39,477 INFO L93 Difference]: Finished difference Result 199 states and 393 transitions. [2021-05-21 20:35:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:35:39,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:39,478 INFO L225 Difference]: With dead ends: 199 [2021-05-21 20:35:39,478 INFO L226 Difference]: Without dead ends: 192 [2021-05-21 20:35:39,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:35:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-21 20:35:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 112. [2021-05-21 20:35:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-05-21 20:35:39,479 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-05-21 20:35:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:39,479 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-05-21 20:35:39,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-05-21 20:35:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:39,480 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:39,480 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:39,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-05-21 20:35:39,686 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash 941329444, now seen corresponding path program 202 times [2021-05-21 20:35:39,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:39,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350483169] [2021-05-21 20:35:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:39,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:39,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350483169] [2021-05-21 20:35:39,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350483169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:39,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594728636] [2021-05-21 20:35:39,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:39,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:39,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:39,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:39,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:40,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594728636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:40,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:40,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:40,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881625386] [2021-05-21 20:35:40,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:40,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:40,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:40,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:40,063 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:40,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:40,356 INFO L93 Difference]: Finished difference Result 152 states and 303 transitions. [2021-05-21 20:35:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:35:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:40,357 INFO L225 Difference]: With dead ends: 152 [2021-05-21 20:35:40,357 INFO L226 Difference]: Without dead ends: 145 [2021-05-21 20:35:40,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:35:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-21 20:35:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2021-05-21 20:35:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-05-21 20:35:40,358 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-05-21 20:35:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:40,358 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-05-21 20:35:40,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-05-21 20:35:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:40,358 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:40,359 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:40,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:40,569 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1487538330, now seen corresponding path program 203 times [2021-05-21 20:35:40,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:40,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966399369] [2021-05-21 20:35:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:40,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:40,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966399369] [2021-05-21 20:35:40,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966399369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:40,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941836761] [2021-05-21 20:35:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:40,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:35:40,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:40,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:40,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:40,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941836761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:40,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:40,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:40,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412857583] [2021-05-21 20:35:40,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:40,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:40,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:40,852 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:41,187 INFO L93 Difference]: Finished difference Result 185 states and 345 transitions. [2021-05-21 20:35:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:35:41,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:41,188 INFO L225 Difference]: With dead ends: 185 [2021-05-21 20:35:41,188 INFO L226 Difference]: Without dead ends: 171 [2021-05-21 20:35:41,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 340.5ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-21 20:35:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-05-21 20:35:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-05-21 20:35:41,189 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-05-21 20:35:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:41,189 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-05-21 20:35:41,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-05-21 20:35:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:41,190 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:41,190 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:41,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-21 20:35:41,390 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:41,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1104817942, now seen corresponding path program 204 times [2021-05-21 20:35:41,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:41,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182119067] [2021-05-21 20:35:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:41,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:41,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182119067] [2021-05-21 20:35:41,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182119067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:41,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598710855] [2021-05-21 20:35:41,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:41,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:41,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:41,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:41,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:41,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598710855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:41,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:41,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:41,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007148300] [2021-05-21 20:35:41,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:41,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:41,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:41,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:41,663 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:42,031 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-05-21 20:35:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:35:42,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:42,032 INFO L225 Difference]: With dead ends: 170 [2021-05-21 20:35:42,032 INFO L226 Difference]: Without dead ends: 163 [2021-05-21 20:35:42,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:35:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-21 20:35:42,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-05-21 20:35:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 113 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 237 transitions. [2021-05-21 20:35:42,033 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 237 transitions. Word has length 19 [2021-05-21 20:35:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:42,033 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 237 transitions. [2021-05-21 20:35:42,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 237 transitions. [2021-05-21 20:35:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:42,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:42,034 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:42,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:42,234 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1110855526, now seen corresponding path program 205 times [2021-05-21 20:35:42,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:42,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093358824] [2021-05-21 20:35:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:42,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093358824] [2021-05-21 20:35:42,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093358824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425620571] [2021-05-21 20:35:42,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:42,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:42,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:42,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425620571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:42,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:42,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:42,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249599189] [2021-05-21 20:35:42,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:42,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:42,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:42,566 INFO L87 Difference]: Start difference. First operand 114 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:43,165 INFO L93 Difference]: Finished difference Result 217 states and 427 transitions. [2021-05-21 20:35:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:35:43,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:43,165 INFO L225 Difference]: With dead ends: 217 [2021-05-21 20:35:43,165 INFO L226 Difference]: Without dead ends: 210 [2021-05-21 20:35:43,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 505.0ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:35:43,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-21 20:35:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 115. [2021-05-21 20:35:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 114 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 241 transitions. [2021-05-21 20:35:43,167 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 241 transitions. Word has length 19 [2021-05-21 20:35:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:43,167 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 241 transitions. [2021-05-21 20:35:43,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 241 transitions. [2021-05-21 20:35:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:43,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:43,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:43,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-21 20:35:43,368 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:43,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1095394730, now seen corresponding path program 206 times [2021-05-21 20:35:43,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:43,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155642320] [2021-05-21 20:35:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:43,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:43,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155642320] [2021-05-21 20:35:43,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155642320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:43,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886852376] [2021-05-21 20:35:43,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:43,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:43,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:43,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:43,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886852376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:43,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:43,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:43,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380799767] [2021-05-21 20:35:43,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:43,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:43,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:43,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:43,662 INFO L87 Difference]: Start difference. First operand 115 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:44,125 INFO L93 Difference]: Finished difference Result 206 states and 414 transitions. [2021-05-21 20:35:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:35:44,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:44,126 INFO L225 Difference]: With dead ends: 206 [2021-05-21 20:35:44,126 INFO L226 Difference]: Without dead ends: 199 [2021-05-21 20:35:44,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 409.9ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:35:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-21 20:35:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 112. [2021-05-21 20:35:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-05-21 20:35:44,127 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-05-21 20:35:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:44,127 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-05-21 20:35:44,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-05-21 20:35:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:44,127 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:44,127 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:44,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:44,328 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:44,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2117510474, now seen corresponding path program 207 times [2021-05-21 20:35:44,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:44,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300872537] [2021-05-21 20:35:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:44,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:44,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300872537] [2021-05-21 20:35:44,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300872537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:44,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082133093] [2021-05-21 20:35:44,409 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 [2021-05-21 20:35:44,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:44,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:44,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:44,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:44,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082133093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:44,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:44,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:44,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408019673] [2021-05-21 20:35:44,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:44,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:44,616 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:44,943 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-05-21 20:35:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:35:44,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:44,943 INFO L225 Difference]: With dead ends: 150 [2021-05-21 20:35:44,943 INFO L226 Difference]: Without dead ends: 143 [2021-05-21 20:35:44,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:35:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-21 20:35:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2021-05-21 20:35:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-05-21 20:35:44,945 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-05-21 20:35:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:44,945 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-05-21 20:35:44,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-05-21 20:35:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:44,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:44,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:45,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-05-21 20:35:45,146 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:45,146 INFO L82 PathProgramCache]: Analyzing trace with hash -98162994, now seen corresponding path program 208 times [2021-05-21 20:35:45,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:45,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311210188] [2021-05-21 20:35:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:45,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:45,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311210188] [2021-05-21 20:35:45,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311210188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:45,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631545751] [2021-05-21 20:35:45,254 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 [2021-05-21 20:35:45,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:45,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:45,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:45,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:45,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631545751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:45,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:45,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:45,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564642618] [2021-05-21 20:35:45,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:45,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:45,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:45,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:45,459 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:45,938 INFO L93 Difference]: Finished difference Result 195 states and 384 transitions. [2021-05-21 20:35:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:35:45,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:45,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:45,939 INFO L225 Difference]: With dead ends: 195 [2021-05-21 20:35:45,939 INFO L226 Difference]: Without dead ends: 188 [2021-05-21 20:35:45,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:35:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-21 20:35:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-05-21 20:35:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-05-21 20:35:45,941 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-05-21 20:35:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:45,941 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-05-21 20:35:45,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-05-21 20:35:45,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:45,941 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:45,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:46,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-05-21 20:35:46,142 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash -82702198, now seen corresponding path program 209 times [2021-05-21 20:35:46,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:46,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519331947] [2021-05-21 20:35:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:46,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519331947] [2021-05-21 20:35:46,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519331947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706813005] [2021-05-21 20:35:46,221 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 [2021-05-21 20:35:46,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:35:46,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:46,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:46,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:46,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706813005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:46,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:46,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:46,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603753330] [2021-05-21 20:35:46,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:46,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:46,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:46,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:46,416 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:46,824 INFO L93 Difference]: Finished difference Result 186 states and 374 transitions. [2021-05-21 20:35:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:35:46,825 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:46,825 INFO L225 Difference]: With dead ends: 186 [2021-05-21 20:35:46,825 INFO L226 Difference]: Without dead ends: 179 [2021-05-21 20:35:46,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-21 20:35:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-05-21 20:35:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-05-21 20:35:46,826 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-05-21 20:35:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:46,826 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-05-21 20:35:46,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-05-21 20:35:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:46,827 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:46,827 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:47,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:47,027 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:47,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2048007766, now seen corresponding path program 210 times [2021-05-21 20:35:47,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:47,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898597908] [2021-05-21 20:35:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:47,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:47,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898597908] [2021-05-21 20:35:47,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898597908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:47,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084014810] [2021-05-21 20:35:47,104 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 [2021-05-21 20:35:47,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:47,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:47,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:47,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:47,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084014810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:47,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:47,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:47,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619412452] [2021-05-21 20:35:47,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:47,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:47,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:47,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:47,359 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:47,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:47,771 INFO L93 Difference]: Finished difference Result 195 states and 385 transitions. [2021-05-21 20:35:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:35:47,772 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:47,772 INFO L225 Difference]: With dead ends: 195 [2021-05-21 20:35:47,772 INFO L226 Difference]: Without dead ends: 188 [2021-05-21 20:35:47,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:35:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-21 20:35:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-05-21 20:35:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-05-21 20:35:47,774 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-05-21 20:35:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:47,774 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-05-21 20:35:47,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-05-21 20:35:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:47,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:47,774 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:47,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-05-21 20:35:47,974 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:47,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2063468562, now seen corresponding path program 211 times [2021-05-21 20:35:47,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:47,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649886368] [2021-05-21 20:35:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:48,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:48,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649886368] [2021-05-21 20:35:48,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649886368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:48,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653686949] [2021-05-21 20:35:48,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:48,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:48,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:48,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653686949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:48,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:48,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:48,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162837559] [2021-05-21 20:35:48,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:48,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:48,363 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:48,771 INFO L93 Difference]: Finished difference Result 209 states and 410 transitions. [2021-05-21 20:35:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:35:48,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:48,772 INFO L225 Difference]: With dead ends: 209 [2021-05-21 20:35:48,772 INFO L226 Difference]: Without dead ends: 202 [2021-05-21 20:35:48,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:35:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-21 20:35:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 114. [2021-05-21 20:35:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-05-21 20:35:48,773 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-05-21 20:35:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:48,773 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-05-21 20:35:48,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:48,773 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-05-21 20:35:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:48,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:48,774 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:48,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:48,989 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:48,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1660043928, now seen corresponding path program 212 times [2021-05-21 20:35:48,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:48,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683667373] [2021-05-21 20:35:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:49,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:49,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683667373] [2021-05-21 20:35:49,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683667373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:49,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524559050] [2021-05-21 20:35:49,063 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 [2021-05-21 20:35:49,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:49,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:49,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:49,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524559050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:49,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:49,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:49,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474713388] [2021-05-21 20:35:49,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:49,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:49,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:49,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:49,367 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:49,695 INFO L93 Difference]: Finished difference Result 162 states and 320 transitions. [2021-05-21 20:35:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:35:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:49,696 INFO L225 Difference]: With dead ends: 162 [2021-05-21 20:35:49,696 INFO L226 Difference]: Without dead ends: 155 [2021-05-21 20:35:49,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-21 20:35:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 111. [2021-05-21 20:35:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-05-21 20:35:49,697 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-05-21 20:35:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:49,697 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-05-21 20:35:49,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-05-21 20:35:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:49,697 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:49,697 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:49,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:49,913 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1291658542, now seen corresponding path program 213 times [2021-05-21 20:35:49,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:49,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563356596] [2021-05-21 20:35:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:49,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:49,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563356596] [2021-05-21 20:35:49,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563356596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774215729] [2021-05-21 20:35:49,986 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 [2021-05-21 20:35:50,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:50,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:50,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774215729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:50,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:50,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:50,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295924751] [2021-05-21 20:35:50,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:50,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:50,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:50,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:50,188 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:50,386 INFO L93 Difference]: Finished difference Result 127 states and 250 transitions. [2021-05-21 20:35:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:35:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:50,386 INFO L225 Difference]: With dead ends: 127 [2021-05-21 20:35:50,386 INFO L226 Difference]: Without dead ends: 120 [2021-05-21 20:35:50,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:35:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-21 20:35:50,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2021-05-21 20:35:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-05-21 20:35:50,388 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-05-21 20:35:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:50,388 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-05-21 20:35:50,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-05-21 20:35:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:50,388 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:50,388 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:50,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-21 20:35:50,589 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:50,589 INFO L82 PathProgramCache]: Analyzing trace with hash 787635286, now seen corresponding path program 214 times [2021-05-21 20:35:50,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:50,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650673617] [2021-05-21 20:35:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:50,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:50,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650673617] [2021-05-21 20:35:50,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650673617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:50,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021879857] [2021-05-21 20:35:50,667 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 [2021-05-21 20:35:50,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:50,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:50,685 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:50,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021879857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:50,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:50,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:50,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136915469] [2021-05-21 20:35:50,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:50,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:50,866 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:51,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:51,261 INFO L93 Difference]: Finished difference Result 162 states and 315 transitions. [2021-05-21 20:35:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:35:51,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:51,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:51,262 INFO L225 Difference]: With dead ends: 162 [2021-05-21 20:35:51,262 INFO L226 Difference]: Without dead ends: 155 [2021-05-21 20:35:51,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:35:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-21 20:35:51,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 108. [2021-05-21 20:35:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-05-21 20:35:51,263 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-05-21 20:35:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:51,263 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-05-21 20:35:51,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-05-21 20:35:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:51,264 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:51,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:51,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:51,464 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash 803096082, now seen corresponding path program 215 times [2021-05-21 20:35:51,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:51,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798322492] [2021-05-21 20:35:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:51,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:51,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798322492] [2021-05-21 20:35:51,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798322492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:51,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908697730] [2021-05-21 20:35:51,549 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 [2021-05-21 20:35:51,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:35:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:51,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:51,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908697730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:51,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:51,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:51,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818421328] [2021-05-21 20:35:51,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:51,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:51,746 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:52,109 INFO L93 Difference]: Finished difference Result 158 states and 313 transitions. [2021-05-21 20:35:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:35:52,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:52,109 INFO L225 Difference]: With dead ends: 158 [2021-05-21 20:35:52,109 INFO L226 Difference]: Without dead ends: 151 [2021-05-21 20:35:52,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:35:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-21 20:35:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-05-21 20:35:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-05-21 20:35:52,111 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-05-21 20:35:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:52,111 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-05-21 20:35:52,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-05-21 20:35:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:52,111 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:52,111 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:52,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-21 20:35:52,312 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1361161250, now seen corresponding path program 216 times [2021-05-21 20:35:52,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:52,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814763904] [2021-05-21 20:35:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:52,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:52,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814763904] [2021-05-21 20:35:52,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814763904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:52,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761929786] [2021-05-21 20:35:52,389 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 [2021-05-21 20:35:52,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:52,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:52,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:52,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761929786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:52,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:52,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:52,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548852069] [2021-05-21 20:35:52,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:52,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:52,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:52,579 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:52,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:52,921 INFO L93 Difference]: Finished difference Result 158 states and 309 transitions. [2021-05-21 20:35:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:35:52,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:52,922 INFO L225 Difference]: With dead ends: 158 [2021-05-21 20:35:52,922 INFO L226 Difference]: Without dead ends: 151 [2021-05-21 20:35:52,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:35:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-21 20:35:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2021-05-21 20:35:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-05-21 20:35:52,923 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-05-21 20:35:52,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:52,923 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-05-21 20:35:52,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-05-21 20:35:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:52,923 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:52,923 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:53,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-05-21 20:35:53,124 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1345700454, now seen corresponding path program 217 times [2021-05-21 20:35:53,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:53,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015719590] [2021-05-21 20:35:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:53,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:53,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015719590] [2021-05-21 20:35:53,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015719590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:53,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013468713] [2021-05-21 20:35:53,203 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 [2021-05-21 20:35:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:53,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:53,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:53,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013468713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:53,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:53,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:53,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652588490] [2021-05-21 20:35:53,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:53,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:53,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:53,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:53,394 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:53,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:53,666 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2021-05-21 20:35:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:35:53,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:53,666 INFO L225 Difference]: With dead ends: 169 [2021-05-21 20:35:53,666 INFO L226 Difference]: Without dead ends: 162 [2021-05-21 20:35:53,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:35:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-21 20:35:53,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2021-05-21 20:35:53,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-05-21 20:35:53,668 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-05-21 20:35:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:53,668 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-05-21 20:35:53,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-05-21 20:35:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:53,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:53,668 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:53,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-21 20:35:53,868 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash -774245648, now seen corresponding path program 218 times [2021-05-21 20:35:53,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:53,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071328524] [2021-05-21 20:35:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:53,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:53,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071328524] [2021-05-21 20:35:53,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071328524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:53,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152921863] [2021-05-21 20:35:53,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:53,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:53,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:53,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:53,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:54,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152921863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:54,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:54,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:54,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922015732] [2021-05-21 20:35:54,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:54,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:54,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:54,142 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:54,385 INFO L93 Difference]: Finished difference Result 142 states and 281 transitions. [2021-05-21 20:35:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:35:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:54,385 INFO L225 Difference]: With dead ends: 142 [2021-05-21 20:35:54,385 INFO L226 Difference]: Without dead ends: 135 [2021-05-21 20:35:54,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:35:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-21 20:35:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-05-21 20:35:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-05-21 20:35:54,387 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-05-21 20:35:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:54,387 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-05-21 20:35:54,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-05-21 20:35:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:54,387 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:54,387 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:54,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:54,588 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1839714458, now seen corresponding path program 219 times [2021-05-21 20:35:54,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:54,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414870110] [2021-05-21 20:35:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:54,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:54,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414870110] [2021-05-21 20:35:54,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414870110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:54,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456394298] [2021-05-21 20:35:54,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:54,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:54,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:54,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:54,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456394298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:54,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:54,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:54,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276736043] [2021-05-21 20:35:54,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:54,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:54,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:54,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:54,866 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:55,148 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-05-21 20:35:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:35:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:55,148 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:35:55,148 INFO L226 Difference]: Without dead ends: 169 [2021-05-21 20:35:55,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:35:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-21 20:35:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 107. [2021-05-21 20:35:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-05-21 20:35:55,150 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-05-21 20:35:55,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:55,150 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-05-21 20:35:55,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:55,150 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-05-21 20:35:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:55,150 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:55,150 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:55,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:55,351 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:55,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:55,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1855175254, now seen corresponding path program 220 times [2021-05-21 20:35:55,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:55,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113027767] [2021-05-21 20:35:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:55,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:55,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113027767] [2021-05-21 20:35:55,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113027767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:55,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504721137] [2021-05-21 20:35:55,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:55,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:55,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:55,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:55,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:55,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504721137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:55,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:55,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:55,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582398229] [2021-05-21 20:35:55,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:55,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:55,618 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:55,973 INFO L93 Difference]: Finished difference Result 188 states and 367 transitions. [2021-05-21 20:35:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:35:55,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:55,973 INFO L225 Difference]: With dead ends: 188 [2021-05-21 20:35:55,973 INFO L226 Difference]: Without dead ends: 181 [2021-05-21 20:35:55,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:35:55,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-21 20:35:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 106. [2021-05-21 20:35:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 217 transitions. [2021-05-21 20:35:55,975 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 217 transitions. Word has length 19 [2021-05-21 20:35:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:55,975 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 217 transitions. [2021-05-21 20:35:55,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 217 transitions. [2021-05-21 20:35:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:55,975 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:55,975 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:56,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-21 20:35:56,176 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:56,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1868337236, now seen corresponding path program 221 times [2021-05-21 20:35:56,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:56,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463806426] [2021-05-21 20:35:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:56,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:56,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463806426] [2021-05-21 20:35:56,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463806426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:56,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694648320] [2021-05-21 20:35:56,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:56,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:35:56,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:56,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:56,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:56,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694648320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:56,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:56,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:56,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631474739] [2021-05-21 20:35:56,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:56,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:56,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:56,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:56,448 INFO L87 Difference]: Start difference. First operand 106 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:56,791 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-05-21 20:35:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:35:56,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:56,792 INFO L225 Difference]: With dead ends: 160 [2021-05-21 20:35:56,792 INFO L226 Difference]: Without dead ends: 153 [2021-05-21 20:35:56,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-21 20:35:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-05-21 20:35:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-05-21 20:35:56,793 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-05-21 20:35:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:56,793 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-05-21 20:35:56,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-05-21 20:35:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:56,793 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:56,793 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:56,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:56,994 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:56,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1265651738, now seen corresponding path program 5 times [2021-05-21 20:35:56,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:56,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19374953] [2021-05-21 20:35:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:57,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:57,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19374953] [2021-05-21 20:35:57,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19374953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:57,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524284404] [2021-05-21 20:35:57,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:57,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:35:57,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:35:57,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:57,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524284404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:57,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:57,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 20:35:57,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118960018] [2021-05-21 20:35:57,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:35:57,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:57,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:35:57,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:35:57,190 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:57,384 INFO L93 Difference]: Finished difference Result 147 states and 293 transitions. [2021-05-21 20:35:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:35:57,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:35:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:57,385 INFO L225 Difference]: With dead ends: 147 [2021-05-21 20:35:57,385 INFO L226 Difference]: Without dead ends: 136 [2021-05-21 20:35:57,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:35:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-21 20:35:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-05-21 20:35:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-05-21 20:35:57,386 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-05-21 20:35:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:57,386 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-05-21 20:35:57,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-05-21 20:35:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:35:57,386 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:57,386 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:57,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-05-21 20:35:57,587 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:57,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1888774482, now seen corresponding path program 222 times [2021-05-21 20:35:57,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:57,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279389950] [2021-05-21 20:35:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:57,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:57,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279389950] [2021-05-21 20:35:57,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279389950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:57,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59761530] [2021-05-21 20:35:57,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:35:57,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:57,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:57,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 20:35:57,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:57,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59761530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:57,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:57,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-21 20:35:57,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972169683] [2021-05-21 20:35:57,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:35:57,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:35:57,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:35:57,870 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:58,250 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-05-21 20:35:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:35:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-05-21 20:35:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:58,251 INFO L225 Difference]: With dead ends: 172 [2021-05-21 20:35:58,251 INFO L226 Difference]: Without dead ends: 158 [2021-05-21 20:35:58,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:35:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-21 20:35:58,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2021-05-21 20:35:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-05-21 20:35:58,252 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-05-21 20:35:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:58,252 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-05-21 20:35:58,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-05-21 20:35:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-05-21 20:35:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:35:58,252 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:58,252 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:58,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:58,453 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:58,453 INFO L82 PathProgramCache]: Analyzing trace with hash -26764772, now seen corresponding path program 5 times [2021-05-21 20:35:58,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:58,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210945998] [2021-05-21 20:35:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:58,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210945998] [2021-05-21 20:35:58,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210945998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186038597] [2021-05-21 20:35:58,538 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 [2021-05-21 20:35:58,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:35:58,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 20:35:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:58,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186038597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:58,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:58,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-21 20:35:58,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220571814] [2021-05-21 20:35:58,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:35:58,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:58,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:35:58,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:35:58,658 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:58,918 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-05-21 20:35:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:35:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:35:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:58,918 INFO L225 Difference]: With dead ends: 146 [2021-05-21 20:35:58,918 INFO L226 Difference]: Without dead ends: 133 [2021-05-21 20:35:58,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:35:58,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-21 20:35:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-05-21 20:35:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-05-21 20:35:58,920 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-05-21 20:35:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:58,920 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-05-21 20:35:58,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-05-21 20:35:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:35:58,920 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:58,920 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:59,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-05-21 20:35:59,121 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1997566364, now seen corresponding path program 223 times [2021-05-21 20:35:59,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:59,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541147121] [2021-05-21 20:35:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:59,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:59,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541147121] [2021-05-21 20:35:59,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541147121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:59,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781085549] [2021-05-21 20:35:59,215 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 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 [2021-05-21 20:35:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:59,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 20:35:59,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:00,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781085549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:00,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:00,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:36:00,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360785460] [2021-05-21 20:36:00,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:36:00,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:00,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:36:00,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:00,395 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:00,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:00,862 INFO L93 Difference]: Finished difference Result 154 states and 304 transitions. [2021-05-21 20:36:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:36:00,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:36:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:00,862 INFO L225 Difference]: With dead ends: 154 [2021-05-21 20:36:00,862 INFO L226 Difference]: Without dead ends: 147 [2021-05-21 20:36:00,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:36:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-21 20:36:00,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-05-21 20:36:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-05-21 20:36:00,864 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-05-21 20:36:00,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:00,864 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-05-21 20:36:00,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:00,864 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-05-21 20:36:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:00,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:00,864 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:01,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-05-21 20:36:01,065 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1614845976, now seen corresponding path program 224 times [2021-05-21 20:36:01,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:01,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269432143] [2021-05-21 20:36:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:01,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269432143] [2021-05-21 20:36:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269432143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216962543] [2021-05-21 20:36:01,161 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 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 [2021-05-21 20:36:01,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:01,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:01,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 20:36:01,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:01,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216962543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:01,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:01,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:36:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142640424] [2021-05-21 20:36:01,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:36:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:36:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:01,367 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:01,767 INFO L93 Difference]: Finished difference Result 159 states and 314 transitions. [2021-05-21 20:36:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:36:01,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:36:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:01,767 INFO L225 Difference]: With dead ends: 159 [2021-05-21 20:36:01,767 INFO L226 Difference]: Without dead ends: 152 [2021-05-21 20:36:01,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:36:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-21 20:36:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-05-21 20:36:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-05-21 20:36:01,770 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-05-21 20:36:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:01,771 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-05-21 20:36:01,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-05-21 20:36:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:01,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:01,771 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:01,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-05-21 20:36:01,971 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:01,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:01,972 INFO L82 PathProgramCache]: Analyzing trace with hash -600827492, now seen corresponding path program 225 times [2021-05-21 20:36:01,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:01,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328244079] [2021-05-21 20:36:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:02,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:02,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328244079] [2021-05-21 20:36:02,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328244079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:02,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313872114] [2021-05-21 20:36:02,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:02,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:36:02,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:02,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 20:36:02,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:02,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313872114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:02,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:02,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:36:02,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769841638] [2021-05-21 20:36:02,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:36:02,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:36:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:02,266 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:02,711 INFO L93 Difference]: Finished difference Result 185 states and 362 transitions. [2021-05-21 20:36:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:36:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:36:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:02,711 INFO L225 Difference]: With dead ends: 185 [2021-05-21 20:36:02,711 INFO L226 Difference]: Without dead ends: 178 [2021-05-21 20:36:02,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:36:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-21 20:36:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-05-21 20:36:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-05-21 20:36:02,713 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-05-21 20:36:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:02,713 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-05-21 20:36:02,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-05-21 20:36:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:02,713 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:02,713 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:02,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-21 20:36:02,914 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash -585366696, now seen corresponding path program 226 times [2021-05-21 20:36:02,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:02,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761287214] [2021-05-21 20:36:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:03,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:03,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761287214] [2021-05-21 20:36:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761287214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:03,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526495954] [2021-05-21 20:36:03,009 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 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 [2021-05-21 20:36:03,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:03,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:03,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 20:36:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526495954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:03,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:03,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:36:03,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735469489] [2021-05-21 20:36:03,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:36:03,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:03,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:36:03,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:03,380 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:03,920 INFO L93 Difference]: Finished difference Result 168 states and 336 transitions. [2021-05-21 20:36:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:36:03,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:36:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:03,921 INFO L225 Difference]: With dead ends: 168 [2021-05-21 20:36:03,921 INFO L226 Difference]: Without dead ends: 161 [2021-05-21 20:36:03,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:36:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-21 20:36:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 112. [2021-05-21 20:36:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-05-21 20:36:03,922 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 21 [2021-05-21 20:36:03,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:03,922 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-05-21 20:36:03,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:03,923 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-05-21 20:36:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:03,923 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:03,923 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:04,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-05-21 20:36:04,138 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:04,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1736931496, now seen corresponding path program 227 times [2021-05-21 20:36:04,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:04,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38750646] [2021-05-21 20:36:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:04,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:04,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38750646] [2021-05-21 20:36:04,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38750646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:04,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325515678] [2021-05-21 20:36:04,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:04,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:36:04,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:04,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 20:36:04,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:05,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325515678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:05,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:05,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:36:05,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509218491] [2021-05-21 20:36:05,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:36:05,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:05,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:36:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:05,414 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:05,853 INFO L93 Difference]: Finished difference Result 176 states and 347 transitions. [2021-05-21 20:36:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:36:05,853 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:36:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:05,853 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:36:05,853 INFO L226 Difference]: Without dead ends: 169 [2021-05-21 20:36:05,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 422.6ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:36:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-21 20:36:05,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2021-05-21 20:36:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:05,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-05-21 20:36:05,855 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-05-21 20:36:05,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:05,855 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-05-21 20:36:05,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-05-21 20:36:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:05,855 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:05,855 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:06,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:06,055 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:06,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1721470700, now seen corresponding path program 228 times [2021-05-21 20:36:06,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:06,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979492251] [2021-05-21 20:36:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:06,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:06,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979492251] [2021-05-21 20:36:06,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979492251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:06,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718144599] [2021-05-21 20:36:06,153 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 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 [2021-05-21 20:36:06,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:36:06,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:06,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 20:36:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:06,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718144599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:06,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:06,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:36:06,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902769845] [2021-05-21 20:36:06,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:36:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:36:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:06,360 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:06,785 INFO L93 Difference]: Finished difference Result 177 states and 348 transitions. [2021-05-21 20:36:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:36:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:36:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:06,785 INFO L225 Difference]: With dead ends: 177 [2021-05-21 20:36:06,785 INFO L226 Difference]: Without dead ends: 170 [2021-05-21 20:36:06,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 400.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:36:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-21 20:36:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2021-05-21 20:36:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-05-21 20:36:06,787 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-05-21 20:36:06,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:06,787 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-05-21 20:36:06,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:06,787 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-05-21 20:36:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:06,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:06,787 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:06,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-21 20:36:06,988 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:06,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:06,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1150015894, now seen corresponding path program 229 times [2021-05-21 20:36:06,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:06,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928535464] [2021-05-21 20:36:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:07,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:07,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928535464] [2021-05-21 20:36:07,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928535464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:07,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055742545] [2021-05-21 20:36:07,081 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 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 [2021-05-21 20:36:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:07,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 20:36:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:07,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055742545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:07,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:07,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 20:36:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628701592] [2021-05-21 20:36:07,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:36:07,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:36:07,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:07,291 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:07,441 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-05-21 20:36:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:36:07,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:07,441 INFO L225 Difference]: With dead ends: 140 [2021-05-21 20:36:07,441 INFO L226 Difference]: Without dead ends: 133 [2021-05-21 20:36:07,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:36:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-21 20:36:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-05-21 20:36:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-05-21 20:36:07,443 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-05-21 20:36:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:07,443 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-05-21 20:36:07,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-05-21 20:36:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-05-21 20:36:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:07,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:07,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:07,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-05-21 20:36:07,644 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1759602972, now seen corresponding path program 230 times [2021-05-21 20:36:07,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:07,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297494973] [2021-05-21 20:36:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:07,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:07,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297494973] [2021-05-21 20:36:07,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297494973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:07,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527941129] [2021-05-21 20:36:07,739 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 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 [2021-05-21 20:36:07,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:07,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:07,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 20:36:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-21 20:47:54,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:47:54,458 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 20:47:54,459 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 20:47:54,461 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 20:47:54,461 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 08:47:54 BasicIcfg [2021-05-21 20:47:54,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 20:47:54,461 INFO L168 Benchmark]: Toolchain (without parser) took 897664.12 ms. Allocated memory was 352.3 MB in the beginning and 914.4 MB in the end (delta: 562.0 MB). Free memory was 331.7 MB in the beginning and 737.1 MB in the end (delta: -405.4 MB). Peak memory consumption was 558.5 MB. Max. memory is 16.0 GB. [2021-05-21 20:47:54,461 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 352.3 MB. Free memory is still 332.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:47:54,461 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.23 ms. Allocated memory is still 352.3 MB. Free memory was 331.6 MB in the beginning and 330.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:47:54,461 INFO L168 Benchmark]: Boogie Preprocessor took 10.84 ms. Allocated memory is still 352.3 MB. Free memory was 330.2 MB in the beginning and 329.2 MB in the end (delta: 990.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:47:54,461 INFO L168 Benchmark]: RCFGBuilder took 204.83 ms. Allocated memory is still 352.3 MB. Free memory was 329.2 MB in the beginning and 317.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-21 20:47:54,462 INFO L168 Benchmark]: TraceAbstraction took 897425.80 ms. Allocated memory was 352.3 MB in the beginning and 914.4 MB in the end (delta: 562.0 MB). Free memory was 317.0 MB in the beginning and 737.1 MB in the end (delta: -420.1 MB). Peak memory consumption was 543.9 MB. Max. memory is 16.0 GB. [2021-05-21 20:47:54,462 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 0.13 ms. Allocated memory is still 352.3 MB. Free memory is still 332.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.23 ms. Allocated memory is still 352.3 MB. Free memory was 331.6 MB in the beginning and 330.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.84 ms. Allocated memory is still 352.3 MB. Free memory was 330.2 MB in the beginning and 329.2 MB in the end (delta: 990.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 204.83 ms. Allocated memory is still 352.3 MB. Free memory was 329.2 MB in the beginning and 317.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 897425.80 ms. Allocated memory was 352.3 MB in the beginning and 914.4 MB in the end (delta: 562.0 MB). Free memory was 317.0 MB in the beginning and 737.1 MB in the end (delta: -420.1 MB). Peak memory consumption was 543.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 897334.5ms, OverallIterations: 241, TraceHistogramMax: 5, EmptinessCheckTime: 58.5ms, AutomataDifference: 71921.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 45.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5334 SDtfs, 15875 SDslu, 41102 SDs, 0 SdLazy, 85267 SolverSat, 2169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30128.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7860 GetRequests, 2318 SyntacticMatches, 287 SemanticMatches, 5255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26016 ImplicationChecksByTransitivity, 77332.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=189, InterpolantAutomatonStates: 3673, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 444.0ms AutomataMinimizationTime, 240 MinimizatonAttempts, 10667 StatesRemovedByMinimization, 240 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 533.7ms SsaConstructionTime, 1630.7ms SatisfiabilityAnalysisTime, 62088.9ms InterpolantComputationTime, 8681 NumberOfCodeBlocks, 8681 NumberOfCodeBlocksAsserted, 840 NumberOfCheckSat, 8202 ConstructedInterpolants, 0 QuantifiedInterpolants, 166902 SizeOfPredicates, 1394 NumberOfNonLiveVariables, 12391 ConjunctsInSsa, 5771 ConjunctsInUnsatCore, 479 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3694 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